I used a chrome spraypaint to change my robots colour, the one I used is normally used on cars.(I put a primer on first) I did a really good job, let them dry and stored the bits in a box individually wrapped in plastic to protect them.

I unwrapped them today to put some decals on and the paint is all scratched on certain parts, I rubbed it with my finger nail and it scratches easily... what have I done wrong?

Gutted, now I'm gonna have to remove all the paint and start again right now my motivation has been destroyed, not looking forward to removing that paint!

Before

after