Rust and POR15
 

How do you scrape rust before applying POR 15?

is there some sort of special tool or just go at it with a flat-head screwdriver.

I have some "superficial" rust around the battery area of my 83sc and i need to treat it. any other good products out there?

thanks.

Seems like when I did my rust-removal routine a few months back, the knowledge of The Pelican recommended a wire brush. Worked like a charm for my light surface rust. If you have more, you might need something more forceful, though.

Dan

Wire wheel brush and/or wire cup brush mounted in an electric or air-powered angle grinder works best for anything more than small, localized jobs. For those, a wire brush/elbow grease is fine. Save the screwdriver for what it was designed for!

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(To open the can of POR15, of course!)

just use a wire brush. vacuum. apply por15 the in about 2-3 hours, hit it with spray primer if you plan on painting it. ounce por15 dries, primer will not stick to it. ever! i got that advise from an old body guy that restores porsches. hope that helps.

After wire brushing use the POR-15 Metal prep on the bare metal. This will etch the bare metal and provide for a better bond between the metal and the POR-15.

A very necessary step, IMHO. I always use that or a generic phosphoric acid solution.

I think the fastest way is a sandpaper roll-lock disc to cut through rust, and the the scotchbrite pads to remove paint in a small area. They're expensive but efficient and work on a drill.

Since I have quite a bit of time in on steel structures in salt water, I can say that there is no substitute for sand blasting, but it makes quite a mess.The good points of sandblasting are 1. it is able to access the tiny craters and pores in the metal,2. it leaves the surface dry, and 3. it leaves a good profile for the coating systems to bond to. Wire brushing and scrapers followed by muriatic acid are second best but are also very difficult to use in a confined place(acid). The acid then requires neutralizing. The problem with rust removal with means other than sand is that tiny rust pockets are untouchable by wire brushes etc., the wire brushes knock the surface rust off but just polish the top of the rust that is down in the little craters. Probably for cars, good hand tool cleaning is sufficient maybe followed by phosphoric acid or Corroseal then the coating. Stopping oxygen contact with the remaining metal (and rust) is critical for the finish to last. De Voe paint makes a great 2 part epoxy that is surface tolerant.It would be a good paint for non visible areas. It is called Bar-Rust 235.Hope this wasn't more than you ever wanted to know about rust!:)