If he's worried about pulling the tank because of rust it may not be a bad idea to get new bolts for the bed, or atleast start soaking the ones you have in penetrating oil for a few days prior to pulling it.
I think the "cera" in cerakote is refering to the ceramic particles in the mix. The C series is rated to 1700 degrees, most mildly built engine headers will probably never reach a temp of more than 1250 or 1350. I've sprayed several sets of headers, the most recent was a well built FE motor that...
DING DING DING.... we have a winner.
As Snatch pointed out the overlap that happens during construction, and water siping are the reason the tire is directional.