I just had a first happen for me, I laid down some model master "British racing green" metallic enamel with my airbrush, then put the model in the dehydrator for a day, then a couple weeks later I finally got around to clearing it with a can of "rust oleum crystal clear enamel" that I had laying around from last year, as I was out of my usual model master stuff in the can, plus the fact they quit making it, (I think, I know they killed the 1/2 oz bottles at least, not sure about the cans) and the fact my "local" hobby shop is about 35 miles away, and on the way to exactly nowhere. It worked ok on most of the model, except the roof, hood and fenders. ( the latter are all separate on this model) it seemed to "craze" in those areas. i was able to polish out the roof for the most part, but elected to strip the hood and fenders as they had a bit of a pebbly finish from the crazing. I also didn't want to destroy the molded in emblems.
I was quite surp to see the crazing was still there, right in the plastic, underneath the paint and clear I had just stripped. I had to sand all that down to the best of my ability, trying not to destroy too much detail.
anybody seen this happen before?
thanks! -Rudy
a few pics:
after clear:
https://i.imgur.com/6d2xj2R.jpg
https://i.imgur.com/GxkYvJQ.jpg
after stripping: https://i.imgur.com/jd8Dvld.jpg