I used a hi-temp, so-called engine enamel from the local O'Reilly Auto Parts. Color was white, same as the inside of the cowling, which is recommended by many to make drips easier to spot.
However, once I was done with the red RTV sealing up all the airleaks, the pristine white baffles were much besmirched.
Unless you're really into looks, leaving the baffles unpainted probably makes no difference in cooling performance and lifetime.
P-town, CA (10 min from KLVK!)
In final assembly...
VAF dues paid 1 Jan 2017