
Its being striped now jus dnt wana repeat.
The problem here is the Rustoluem clear, while enamal based, contains a different formula that uses hotter and stronger cemicals. The color you said you applied was Testors colors by Boyds enamal, which is a hobby grade paint for model styrene use and is cemicaly "softer". So "hotter, over "softer" can lead to major issues that can be avoided with the right painting steps.
If you use a hobby-grade paint as a primer/color coat, then the color must be within the same formula/grade. EG: Testors over Testors, Tamiya over tamiya, etc. But if you use a "hotter" paint over the "softer" paint, like Rustoluem, Krylon, Colorplace, Valspar & so on. THIS IS A NO-NO!!
However, you can apply say, the hotter paint then the softer one over it and you'll get good resolts (but remember about what paint types that can be applied over one another, such as enamal, acrylic, lacquer, the like)
Heres one more hint, on the next primed (or reprimed) body, apply a coat of the hotter grade primer of your choise that wont craze the plastic, then hit it with the color coat (ether hobby or hotter), then the hobby paint of your choice and the clear, but THAT MUST match up with the brand of the hobby paint or formula grade or you'll get problems again.
Or, you can go to your local supermarket or department store and in the cleaning sections, pick up a bottle o' some Pledge floor wax with future shine (AKA, the famous future everyone uses on here). This stuff is acrylic based, but can be applied almost over anything and every surface. And can be applied from the bottle with a cotton ball, q-tip, brush, or as some people do it, with an airbrush at high PSI or whatever works for you. The stuff is watery, but with quick even coats it can get the job done.
One thing you must watch out for when using Future, SPIDER CRACKS on the surface! This happens when the paint underneath is not fully cured enough (usealy happens with testors and most enamals; must be cured for almost 3 weeks before applying future), or when the uncoated surface is greasy or contains other containminates to form a reaction with the future.