I just began using the product on my 77 MGB project car which has a lot of rust. So far I wire brushed the rust and cleaned all surfaces. After application, the results were as advertised. My only concern (my fault...not fully following directions) was the spray coverage on bare and painted surfaces. It formed a sticky film that I could only get off with MEK. I tried priming over the sticky surface, but the primer did not adhear (As STATED in the direction!). I am confident this product will arrest the rust and provide a suitable primer surface. Thanks Eastwood. Bobby