Depends on how hot you think you might run them. The H-series of oven cured coatings which are the most commonly used are good to 500F. if You need higher temperature capability you look to the C-series and maybe even the V-series. The temperature limits vary depending on the specific color with the maximum being 1800F.
I used high temp paint that I bought from Home Depot. It worked out well. It can withstand at least a 60 round mag dumps out of a 10.5" SBR and it won't even show wear. I refinished one as a pet project and it's been working great.