help

So im at the stage where im working on several models clear plastic parts all at the same time, (finishing my de Havilland mosquito canopy, p-40 canopy, and the porsche windows im doing the outside edges black) my question for the pros is how do you guys stop the paint from bleeding underneath...

Greetings all, I've been armor modelling for a few years now and decided to do something complicated. I want to build a replica of a tank that is parked in front of the Annapolis Maryland National Guard station. My idea is to build and paint it exactly as it appears now and make a diorama of...

As the title says I am having a wierd problem with my paints, i spray it and while it is still coming out of the brush it becomes a sort of cob web. I have a picture but its hard to see the problem.