What to use to treat minor corrosion on Spar

[jiott]

I painted the inside by putting a tennis ball in one end and pouring some primer in, then jam another tennis ball in that end and tip and slosh the primer all around, then pour out the excess.

The outside was painted by brush after the ribs were all glued in and varnished. I did not paint over the varnished ribs.

[Northof49]

Alodine is for aluminum ,just be sure to remove all the black pitted in the corrosion.

[jmodguy]

What color Scotch brite pad did you use?

[DesertFox4]

What color Scotch brite pad did you use?

Jeff, I was wondering the same thing.

[dholly]

What color Scotch brite pad did you use?

Use the maroon color pads (item #7447) only, they are manufactured with a very fine grade aluminum oxide grit abrasive. Do NOT use the gray pads (item #7448), as they contain silicone carbide grit abrasive. The silicone carbide could break down and stick in the aluminum causing corrosive stress points, very much like marking aluminum spars with a pencil is a no-no (use ball-point or felt tip pens when marking on bare aluminum!).

[southwind32]

What color Scotch brite pad did you use?

The maroon colored