This is rattle can grill/stove paint from Rustoleum. "Ultra" is on the label; it may be a new product.
I was gonna see about JetCoat but these pipes were used and budget and you know how it goes. So I googled "Best exhaust paint" and came up with a year-old article that rated Rustoleum header paint very high—like third of 10—in some tests.
So...easy. Grabbed a can of that on the next Home Depot run.
And I had the tubes stripped and cleaned and cleaned and cleaned and hung up and was literally rattling the can and ready to spray when I stopped to check the label which said PRIMER STRONGLY RECOMMENDED.
Of course I did not have the requisite Rustoleum High Heat primer in the paint cabinet, so back to the Despot I trekked and of course those MF's also did not have this product in stock....
So scanning the shelves there I spotted this silver grill paint. Rated to 1200F instead of the other stuff's 2000F. Read the label: no primer needed. So I spent the $7 on a whim and returned home to check the Google reviews.
Ended up on a HAMB thread where those old farts sang this stuff's praises, several knuckleheads in a row.
As you all probably know I deeply admire the HAMB aesthetic, as each and every poster there has built literally dozens of race-and-show-winning hot-rods directly out of old bed frames and discarded 50-gallon drums.
So I said "screw it" & went out and shot the paint, trying the next day to burn it off in the grill at 600f (best it could do).
No smoke whatsoever.
I mean...no smoke.
I have painted my share of exhaust systems in my 35 years of car tinkering. I have never yet not gotten a smoke show from it on startup.
Se I guess we'll see what's what pretty soon. Hopefully this weekend. 