The trick is… to follow their instructions. Clean, clean, and clean, zinc phosphate with their Metal Prep, wash with detergent to remove the powdery iron phosphate residue, let dry, then apply within the correct temperature range.

I have had great results with it, but it has peeled and fell off when I took shortcuts or just applied over a dirty substrate and rust or, when I did not wash the powdery white iron phosphate residue from the surface.

As with anything in this phase of work and any product out there - the technique to a fine result is spending 95% of the time on surface preparation. And, there will be those who had good results and others who have not. Best thing is to buy a small can, try it on small parts, and see if you like it or not. It seems to stick best on rough or cast surfaces rather than smooth stamped steel too. On some of my frames it has peeled and others not. I would say results are mixed. A one ton frame has been sitting exposed now for over 10 year in spite of some minor UV fading it’s held remarkably well.

When it doesn’t adhere, it can literally be pulled off in small sheets. Wasted time and money. Don’t be in a hurry and do what you can to prep the surface to increase the odds of success.

Last edited by tom moore; 10/23/2023 3:40 AM.

1946 GMC Project
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