I have an M38 frame that I stripped down completely, I cleaned the oil, dust etc and applied the rust converter than the RE Product, frame had rust and bare metal. Is the RE supposed to be soft and it is not adhereing is some spots, scratches with a finger nail? This is after 24 hours of curing, I was hoping since this is the frame it would be hard and scratch resistant? Did I do something wrong? I plan on top coating it with chassis black, should I remove it entirely and go with a different product?