paint problems on resin models

[Zatchmo]

hello all, i was wondering if anyone has experienced this before.

i am building a resin model and the paint keeps peeling off whenever i pull off a masked section. i know resin models require special primer base coats for paint to adhere properly, so i assume this is because the base primer coat either isn't doing its job or i don't have enough on the surface of the model.

anyone have any input or suggestions for a better primer? i am using autmotive primer from wal mart at the moment.

[futch]

did you soak the resin parts overnight in dish washing detergent/water, then scrub/rinse under warm water with a tooth brush?

sounds like mold release or natural silicone oil is between your primer and the resin.

if the surface is textured, it's harder to get the mold release out.

[Slave1]

I'm actually having the same exact problem with the Fantastic Plastic A-Wing. I barely touch a part with my fingernail and the primer chips right off. I also have tried cleaning the mold release off several times but it's still giving me issues

[Joseph Osborn]

Automotive lacquer-based primer is good stuff for priming resin to take regular model paints. I use Mann mold release spray, and it's made up of a wax-like silicone compound. Normally all it takes is dishwashing detergent or alcohol to strip the mold release. I keep some resin parts around for paint and decal testing and from from time to time I'll strip them with Castrol Super Clean. I find that these parts paint easily without primer because the Super Clean has done such a thorough job of pulling the trace oils out of the resin. So maybe you should try a little Castrol Super Clean on the resin and see if the primer sticks better. Now, if you happen to use the hardware-store variety of silicone spray lubricant as your mold release, you will never get paint to stick to it.