I have a big problem painting this car. I want to paint the Roof and Deck lid Silver (all the way to the edges) decal the 1/4’s, doors, front fenders and hood dasher Medium Red. The Hood is Flat Black. Problem is when I go to lay the Red on the side of the car it bleeds over very badly onto the 1/4 dasher (the flat top side of the 1/4’s below the roof line) and part of the door as well, which are supposed to be silver. Anyone come up with a work around. I’ll post a pick of what I’m talking if need be.
Was going through the forums and saw your post.
I’ve got a Chevelle and am happy with the stock dark green paint, but I tried fishing for what you’re talking about. You should definitely post a pic or two because I have no clue what you’re talking about.
This is the REGULAR Chevelle that you’re talking about, right? (I have both, but clarification is nice.)
I’m guessing OP is talking about the '67 Chevelle (?) and I see the problem- I also don’t see a workround other than dropping the decals an inch or so (in ‘car’ measurement, if you know what I mean) so that they don’t bleed, and just doing the main part of the side, not the whole thing. If you put the decal to where it bleeds onto the quarter panel, you can then cover the bleed-over with the base color, but then your cover decals bleed down onto the side…so that doesn’t work very well, either.
I would say shrink the decals. Do the trunk the roof as 2 separate pieces, or more if need be. Hope this helps. 
I’m pretty sure at least 80% of the cars have paint issues I just don’t paint them