Stone Chip Paint

I'd recommend a Stone Stomper.

I painted our Tvan stone guards with "Raptor Liner" - you can get it at Autolac. I prepped the stone guards by sanding them priming then painting a few times with a roller. I found that it was not much better than normal paint and so was a waste of time.

I've heard good things about Rhino Liner but it's more expensive because you have to get it professionally applied.