PeachParts Mercedes-Benz Forum - View Single Post

dmorrison · #4 04-27-2005, 12:57 PM

This will be a bigger job than you think. Your plan is sound but rust and painting always are a bigger job then what it seems like on the surface.
I used POR-15 extensively on my Sons 65 Mustang. It is good stuff AS LONG AS YOU FOLLOW THE DIRECTIONS. Use all 3 of their products and don't' cut any corners. POR-15 cleans up with their cleaner or 3M weather strip adhesive remover will also do the job.
POR-15 works best on a rough surface. It gives it something to grab onto. If you sand or grind the rust down to new bare metal, it may separate from the metal.
Clean the wheel well completely of dirt and grease. A wire wheel on a drill is good, along with a strong degrease, rinse completely. Then use the Marine Clean to completely degrease the wheel well. Apply Metal Ready. Do not let it get on any painted surface you do not want to discolor. Then apply the POR-15 paint. Cover yourself completely, gloves, long sleeve shirt, etc. POR15 is a polyurethane paint and if it dries on your skin you will have to wear it off, about 1.5 weeks to completely disappear.

The bubbles. More than likely they will grow in size as you start to remove the rust. Expect this. The POR will work fine but once you touch up the area it will be noticeable. Painted, but not perfect. Now the bubbles may be rusting thru from the wheel well, this is common. Don't freak out if it has done this. POR15 has a 2 part putty that may be used to fill. You can then sand it smooth. They also have a gel type POR 15 paint.

So if you want to preserve the fender, POR15 it. but as I said when it comes to rust, there will be more than is showing once you get into the job.
Also, if that fender is rusted your other fenders may have started on the rust path. Take a look

Dave