Matt,
I don't have a clue why you are getting lifting. I never get any. One thing is I always use 3M 1/8 inch green tape on all edges and blue painters tape over it. I just can't bring myself to use regular tan masking tape as I am sure it would lift some paint as it's just too aggressive.
You definitely need a good base of white under yellow. What you are finding is the interesting part of HOK paint. You want to lay on multiple thin coats, almost dry. You don't want to lay it on heavy and wet.
The best product I have found to clean it is HOK AC100 cleaner. It's perfect as you can lay it on pretty heavy without removing paint. Most cleaners are too aggressive. I don't know what's in it, but it smells like kerosene. You would think it would leave a film, but it doesn't. It says not to use it over art work., but if you put it on light, it's fine.
http://www.coastairbrush.com/products.asp?cat=292&pg=2
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