I can't say how well the aerosol can method works, but I have sandblasted several sets of headers that were coated with this product either brushed on with foam brushes or sprayed on. The sprayed headers seemed to turn out with a more even finish, but the brushed ones were not bad. The key is to sandblast them as clean as possible, be sure to wipe off any spots where they will have any oil residue on them from your hands and fingers then follow the directions closely on drying time and getting them back on the engine to fire it up and cure the coating. For the money it's a good product.
Hey Dan Moore, you're #1.
RIP Mark Graham & WB Hutto