I used Rutland Stove Polish. Easy to apply, just wire brush the manifold, apply it with a tooth brush then wipe it off. As the engine runs, it bakes it in making the manifold look black. Lasts about a year before it needs to be reapplied. I bought it at Ace Hardware. Here is a [LINK].
Last edited by Gdads51; 02/09/20242:52 PM. Reason: fix link to Ace product
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum