DON'T use acrylic spray. It WILL NOT take any wear.
UNLESS it's in small areas like inserts (bezels) for build-up and will susequently be cleared with urethane.
Trust me.
I need to build up a few inserts & a few bits where the clearcoat is worn, but not the artwork, should I use polyurethane? (I'm thinking with an eyedropper or something?)