Why not both? I have a set of shorties that Jet Hot coated inside and out. And Jet Hot offers a lifetime warranty to the original buyer. So if they peal, they will re-coat them.

DynoDave
Walter P. Chrysler Club - Great Lakes Region
Member # 12304
1970 Plymouth Duster
1972 Dodge Charger Rallye
https://wichargerguy.proboards.com/
1977 Chrysler Cordoba