sorry about the super long reply time. tips, eh? wasnt long ago I was asking for tips from every experienced person website or article I can find. Thats one of the best tips I can give you: Gather as many tips as you can! Horde them up because every scrap of advice as to how to get better gets you a little better so ask EVERYONE. Read all the material you can find on it, too.

As for actual painting tips, work on steadying your hand. good practice for this is trim on space marine shoulder pads, if you happen to have any. Thin your paints, especially white. always try something interesting. A lot of the mechanithrall painting was done by the seat of my pants. I just looked for an interesting tone to use for skin color, interesting tone to use for gore, slapped em on washed and highlighted and painted the fists and metal. Always experiment with the paint. its cool stuff.