If it were mine, I would sprak the pipes down with brake cleaner spray, let it flash off, dry, and then spray it with high-heat silver/aluminum paint. Let that dry and mist another coat on top of it. Then let it cure for a few days in a hot garage before installing. The exhaust heat will further cure it, I suspect.
"Aluminized" just means it is more resistant to normal steel rust, not that it will not rust at all.
If you might want it to be more incognito, use satiny high-heat black rather than silver/aluminum.
Eastwood used to have a paintable paint for exhaust manifolds, called "Kalyx" or similar. Had to apply it like a paint with a paint brush. Might work on pipes, too, but the spray will be quicker to do, if not better in the long run.
Just some thoughts,
CBODY67
