I agree with the phosphoric acid approach, based on my
experience with that stuff.
And get lots of scotch-brite pads!
You can do a first pass with the pads and detergent,
to remove the loose flaky, dusty rust.
Afterwards paint it with 2-part epoxy primer like
PPG's DPLF, NOT regular automotive primer. Most
rattle-can automotive primers are lacquer-based with a
lot of fillers like talc, and do not seal the surface
at all. I'm sure you have seen a car with a hood or
fender that was stripped and given a coat of gray
rattle-can primer and then never properly finished,
and new rust is starting to come through it?
Doug
--- Karl Vacek <kvacek@ameritech.net> wrote:
> If the rust is too much for plain conversion
> coating, go to Home Depot, etc.
> & buy a gallon of phosphoric acid, dilute minimally
> as directed, and bruch
> it on repeatedly. Scotch-Brite helps in the
> process, and is better than
> most alternatives. Wear gloves - it won't hurt now,
> but the rough peeling
> skin on your fingers in a day or two will make you
> wish you hadn't bathed in
> it.
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