krylon spray

I certainly have used it the other way around- Testors enamel over Krylon.  However, primer over enamel can be another matter.  The normal way to test this is to do a sample as an experiment.  Paint a piece of scrap plastic with the Testors primer, then spray the Krylon white.  When dry, see if there is any problem.

BTW, near the very bottom of Finescale Forums is a forum just about painting and airbrushing.  This is an excellent forum for paint questions.

If you're spraying directly from the can the only problem you need to concern yourself with is getting it too heavy. It isn't going to react if the primer has had time to cure.

I'd advise using an airbrush if you have one. Just decant the Krylon and spray that way so you can control coverage. The only issue you need to worry with there is degassing. When you decant any spray paint you need to let the propellant "burn" off. Just decant into a jar (glass...it will eat plastic) and leave the lid of at least 24 hours. To test that its ready to spray from the AB give it a good shake with the lid on. If it gets cold and hisses when you open it it is t ready. I've experienced, and seen pics on forums, or paint jobs ruined by not allowing decanted paint to degass. I can't explain why the propellant will react coming from and AB and not from the can, but I promise you it does.

thanks for the feedback. I ended up going with a coat of gloss white testors enamel. no risk. worked great.  thanks for the tip on the site navigation