exhaust coating options

Just did my cast manifolds yesterday. Used 1200' hte Sand blasted , cleaned and sprayed. Didn't have oven to cure (wife) so used rosebud tip on torch and digital thermometer. Heated to 200', cooled 30 min. Heated to 400', cooled 30 min. Heated to 600' and let cool. Trying to follow directions on can. Torch didn't phase the coating, but directed heat to interior as even as possible thru each port. Looks good, will try to remember to let you know how it turns out.
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