Do Not Use Por 15 on smooth clean steel
Hi Jordan
What ever you do DO NOT use Por 15 on clean smooth steel it will not stick in the long run, it will peal.
Reason I mention this is that your photos show major areas of the frame that look to have good paint which will mean areas of smooth steel.
When I restored my Pattern 12 some years ago I used Por 15 with their metal cleaner and metal etch. Everything is fine on rusted areas or areas which were uniformly roughened with sand blasting or grinding which Por 15 was applied.
But on areas that were smooth because of being new steel or areas where the paint had protected the steel. The Por 15 has pealed off. I discovered this recently when working on the Pattern 12 doing it's nose change. Now I have areas where the bare steel is exposed. In some areas this is nothing to repair in other it is going to be a real pain.
Yes I am still using Por 15 on projects but only in locations that when cleaned and ready for paint actually feel rough to the touch. Which really leaves a problem on finished surfaces like sheet metal, who do you blend areas from Por 15 to regular primer or PORs Tie Coat Primer.
Cheers Phil
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