Author Topic: Painting section...HOW TO?!?!  (Read 18093 times)

ScaleModelMadman

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Re: Painting section...HOW TO?!?!
« Reply #30 on: Wed May, 23, 2012, 01:01:PM »
I have a question about base-coats.

I'm kind of a novice. I used to do cars a long time ago, but wasn't too demanding about the quality. Now I'm trying to get my skills up to apply to a bunch of Maschinen Krieger kits I bought...

Anyway I was working on a some armor and I put a base coat of black Vallejo on it. And then (after it had dried) put a  couple of coats of Tamiya acrylic paint on it (out of a spray can, don't have an AB yet). Then I put on a coat of clear (I think it was umbroll) and started doing the detailing...

I had masked off and painted some parts, but when I took the masking tape off, all the layers came off right down to the plastic...
What did I miss? I read (on the Vallejo base coat can) the model needed to be degreased and I washed the sprueus before I started, but didn't wash the assembled model. Is that something you guys would do? and if so, how?

A tried masking other bits (this was ruined and had turned into an experiment anyway) and I put the tape on some cloth a couple of times to diminish the adhesiveness, but still all the paint came off...

Hope you can help.

Thanks!

Can't really say what happened, obviously the initial base coat didn't stick to the plastic. Was it Vallejo primer, or just Vallejo black paint?

I've never personally had masking tape pull off paint right to the plastic.



hi,
i am just getting back into model building and at this time i am enjoying building military aircraft. my problem is recently i purchased a masking tape for scale models and the adhisive residew is on my perfect paint job. i,ve been all over the place trying to find out how to safely remove it so i can paint the next color without ruining the first one. help!!!!!!!!!!!

Did you try your finger, rolling it into little 'snots' and removing it that way? An eraser maybe? Warm soapy water and a soft cloth?

Offline Glorfindel

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Re: Painting section...HOW TO?!?!
« Reply #31 on: Thu May, 24, 2012, 09:15:AM »
I have a question about base-coats.

I'm kind of a novice. I used to do cars a long time ago, but wasn't too demanding about the quality. Now I'm trying to get my skills up to apply to a bunch of Maschinen Krieger kits I bought...

Anyway I was working on a some armor and I put a base coat of black Vallejo on it. And then (after it had dried) put a  couple of coats of Tamiya acrylic paint on it (out of a spray can, don't have an AB yet). Then I put on a coat of clear (I think it was umbroll) and started doing the detailing...

I had masked off and painted some parts, but when I took the masking tape off, all the layers came off right down to the plastic...
What did I miss? I read (on the Vallejo base coat can) the model needed to be degreased and I washed the sprueus before I started, but didn't wash the assembled model. Is that something you guys would do? and if so, how?

A tried masking other bits (this was ruined and had turned into an experiment anyway) and I put the tape on some cloth a couple of times to diminish the adhesiveness, but still all the paint came off...

Hope you can help.

Thanks!

tfish I think I can help shed some light on what happened to your base coat. I think, I stress this, think one problem might be the masking tape your using. You should be masking off with either Tamiya tape or 3M Blue Masking tape which they now make with an even lower tack then the original. The second part, and more importantly, is the mold release on the plastic itself. If the parts aren't washed in a de-greasing dish-washing soap the mold release will still be present deep within the surface of the plastic. This the paint/primer cannot adhere to. What appears to be dry will actually lift because the mold release has no tooth for the  paints to bond to. So what happens next is when you pull off your tape the mold release gives what ever paint is on it right back to the tape.
As a rule of thumb I always wash a model before I start construction. But I'm anal like that. Any liquid dish soap will do as long as it has de-greasing formulization. I soak the sprues in a pan for about 30 minutes in warm water...never hot....then let them air dry on a towel, sometimes over night.
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Offline SrsBidness28

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Re: Painting section...HOW TO?!?!
« Reply #32 on: Thu Aug, 23, 2012, 11:02:PM »
I am getting back into building models again after a 20 year hiatus, and am looking to build my skills.  I have done quite a bit of research on painting, but am having some issues.  The biggest question I have is how long should I wait between coats for wet sanding (primer, base coat, and clear coat).

Also, I have seen a fair amount about Future.  Does that replace something like clear coat in the rattle can? Or is it used in conjunction.

Here is the process for painting as I understand it:

Primer
Sand (400 grit)
Primer
Wet Sand (400 grit)
Primer
Sand (600 grit)
Base Coat
Sand (800 grit)
Base Coat
Sand (800 grit)
Base Coat
Sand (1000 grit)
Clear Coat
Clear Coat
Clear Coat
Not sure but I think this is where I am supposed to use rubbing compound and polish, but is this where Future would fit in?

One more question - is there a general rule of thumb on drying times before I can wet sand?  I know primer is going to dry quicker than base coat, but I also don't want to wait as long for primer as I do for base coat.

Sorry for the long post, but I have a ton of questions (this only scratches the surface).

Offline dizz16

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Re: Painting section...HOW TO?!?!
« Reply #33 on: Tue Nov, 27, 2012, 05:39:PM »
Hi all,

Found the right place for my post :)

I need some help please. I bought a Badger airbrush and jump straight in to give my 1st model (F-15) a base coat with a enamel paint. I found it very hard to clean the airbrush and the model feel very "sticky" in a sense even after 5-6 days.

I started to practice on a piece of paper/cardboard/off-cut plastics etc, and changed over to Tamiya's waterbased paints...for me at the moment it is just a lot easier to clean the airbrush afterwards.

So my question is, now that I have an enamel base coat on my F-15, how do I go about to paint it with a waterbase paint...is this even possible? My panels are already not too visible (think I got a too think base coat on) and I don't want to do something wrong going forward....

Any help please?
« Last Edit: Tue Nov, 27, 2012, 05:43:PM by dizz16 »

Offline dizz16

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Re: Painting section...HOW TO?!?!
« Reply #34 on: Thu Nov, 29, 2012, 04:21:AM »
Hi guys, sorry I dont want to bump this post, but I really need some help with my question above...I can't go any further without knowing how to proceed. Really hope someone can shed some light on my issue.

Happy days and keep on modelling!

ScaleModelMadman

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Re: Painting section...HOW TO?!?!
« Reply #35 on: Thu Nov, 29, 2012, 08:17:AM »
I have covered enamels with acrylics no problem as long as the enamels are dry and have completely gassed out.

However, if your paint is still sticky to the touch after five days or more, something else is wrong.

If your panels are already not visible, any more coats of paint will hide them even more.

Personally, I would recommend just forging forward with the enamels as the finish and saving the acrylics for your next build, or if the enamels are still 'sticky' consider stripping them.

Offline dizz16

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Re: Painting section...HOW TO?!?!
« Reply #36 on: Thu Nov, 29, 2012, 09:39:AM »
.... or if the enamels are still 'sticky' consider stripping them.

Hi there, thanks for the advice. I think I can manage with another thin layer, but I'd like to know what you mean by stripping them? I guess it is taking off the enamel, but can you please explain the process?

ScaleModelMadman

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Re: Painting section...HOW TO?!?!
« Reply #37 on: Thu Nov, 29, 2012, 09:46:AM »
Sorry no, I have never stripped paint (and yes, that means take it off)

...but there are threads here and all over the internet about it using oven cleaner and similar products to remove the paint down to the plastic.

Offline jonjon

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Re: Painting section...HOW TO?!?!
« Reply #38 on: Mon Feb, 18, 2013, 11:12:PM »
Ok, before I order any paint, mainly Vallejo paints.  I've notice that they have Model Air, and Model Color paints, whats the difference between them?  Can I use Model Air type paint for paint brush too? or would I need to use Model Color instead? lol...and Model Wash? huh?

thanx
« Last Edit: Mon Feb, 18, 2013, 11:14:PM by jonjon »

Offline spud

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Re: Painting section...HOW TO?!?!
« Reply #39 on: Thu Feb, 21, 2013, 09:31:AM »
model air is for the airbrush but can still be brush painted. the wash is just like the AK products just by a different company

Offline jonjon

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Re: Painting section...HOW TO?!?!
« Reply #40 on: Sat Feb, 23, 2013, 10:25:PM »
thanx!

Offline ExodusInside

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Re: Painting section...HOW TO?!?!
« Reply #41 on: Sat Mar, 16, 2013, 03:00:PM »
Two quick questions.... one - how do i strip old paint off plastic without damaging it? ( airbrushed a model, without reading the label that says NOT FOR AIRBRUSHING ), two - my dad says a few of you may or may not know the appropriate thinning ratio for vallejo paints because it's possible to use them for airbrushing ( said paint from first question )

thanks guys!

Offline Ian

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Re: Painting section...HOW TO?!?!
« Reply #42 on: Sat Mar, 16, 2013, 08:08:PM »
Striping with Simple Green works for me.


Offline Ravhin

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Re: Painting section...HOW TO?!?!
« Reply #43 on: Sat Mar, 16, 2013, 09:41:PM »
Those paints that say not for airbrushing can be airbrushed and I don't see there any reason to strip the paint. That warning is due to some safety regulation I believe.

As for the thinning ratios I'll let that for someone who has actually airbrushed with them.

Offline Elm City Hobbies

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Re: Painting section...HOW TO?!?!
« Reply #44 on: Sun Mar, 17, 2013, 01:56:AM »
Two quick questions.... one - how do i strip old paint off plastic without damaging it? ( airbrushed a model, without reading the label that says NOT FOR AIRBRUSHING ), two - my dad says a few of you may or may not know the appropriate thinning ratio for vallejo paints because it's possible to use them for airbrushing ( said paint from first question )

thanks guys!

OK, first off, Vallejo Model Air is designed to be used in the airbrush, they are pre-thinned, so it takes the guess work out of having to thin paint to airbrush.

Vallejo Model Color is more designed for hand brushing, but can be thinned to be airbrushed. Yes, some of the bottles do have the warning saying DO NOT AIRBRUSH, but it is only there because those paints will have a bit of Cadmium in them to help create the brilliant hue of the pigment.

The reason Vallejo has those warnings on the bottles, is because they have to have it if they want to sell the paint in the various countries that you will find Vallejo.

As  Vallejo dealer, I talk to the guys at Vallejo fairly often (once a month or so) and have talked to them about these warnings, and they basically said what I posted above, that they have to put the warnings on them because of certain materials in the paint. However, there is such a small amount of it in the paint, that you would have to swim in a vat of the paint, and ingest massive amounts of the paint in order for the cadmium to have any ill effect. Something I am sure none of us is doing is swimming in a vat of paint, or adding it to our coffee.

So in the end, don't worry about it, if your kit is already painted with it using an airbrush, well congrats, no need to strip it off, continue on with your kit.

As far as thinning Vallejo Paint, as I said above, the Model Air, is pre-thinned, so no need to thin it, and if you do, literally, a drop or 2 of thinner in a color cup of paint is more than enough.

Thinning the Model Color line couldn't be easier with Vallejo's reformulated Airbrush thinner. 2 to 3 parts thinner to 1 part paint, and you are good to go, couldn't be easier.

The Model washes are just that, washes for your kits. You can use them with a brush to darken the recesses of your model's panel lines, or you can airbrush them on and the wash acts like a filter, they do work quite well from the little I have used the couple of samples I received from Vallejo. I have the entire line of Washes arriving Monday as well as the new expanded colors in the Model Air line.