Has anyone used Rust Prevention Magic ("RPM") produced and sold by ECS? I tried it on the prop valve and will interested to see how it holds up. The prop valve was stripped, holes plugged, and then media blasted. Once it was blasted I hit it with the wire wheel. The whole thing then went to White Post and was rebuilt. It was delivered back to me exactly one week I after I mailed it out.
The RPM stuff is like the consistency of somewhat dry mink oil waterproofing. They recommend heating the part with a heat gun/hair dryer, and then applying the product with a stiff natural bristle brush. Let it soak in, and after the part cools rub off the excess. Once finished it has a slight waxy type feel. We are going to do a test sample on a piece of steel and leave it outside. I'll report back the results. Here's the prop valve before and after application. There is no visual difference. The lighting makes the part look shinier than it really is.
