Posted by Brian in Oregon on July 29, 1999 at 14:11:34:
In Reply to: Re: Followup on rust prevention paint post from down the page a ways... posted by Moby on July 29, 1999 at 13:53:12:
....you'll need to put some tooth on the surface if it is glass smooth.
You can sand lightly with 600 (even 400) in an orbital sander for large areas. Or you can chemically prep the surface. Rodda also sells a product called Metal Prep that will provide a tooth. $8/qt or $30/gallon. Wipe it on, let it sit, wipe it off.
I sandblasted my 1941 frame. I have very rough areas and also very smooth, but not glass smooth, areas. The original Barrier product stuck well to both. Not knowing the color of the original primer I used their green primer, which is similar to green zinc chromate. They used to have yellow, but apparently discontinued it. It was close to yellow zinc chromate.