I have various things I would like to paint. The topside of microSD cards for one, a few jump drives, and a few adapters. Everything I want to paint seems to be a slightly different plastic. I have tried Rust-oleum Ultra cover 2in1 spray paint+primer which is latex paint. Even though it says "Also Bonds to Plastic!", the paint was way to gummy and my fingerprints left indentations at the slightest touch. The paint also immediately started chipping/flaking off. Then I used Pactra Racing finish spray paint (which I think is a subsidiary company/product of Testor), but when I remove the MicroSD card from a port, the paint on the tab end, the end my finger nail touches, comes right off. This is very frustrating. does anyone have any suggestions? Also, should I use a sealant or finish?