If I take them to local paint shop for strip, primer, and paint will regular poly urithane hold up? or will it have to be a high temp paint?

if head temps reach 350 then i'd say the tin gets to around 325

i did use high temp paint....and so far its still there.

I have seen painted and they look ok but when they get dirty, the paint ships and peels. I have always powder coated the sheetmetal and it holds up really well.

Unless you stay on top of it...anything but black looks like crap after awhile.

Powder coat it....