No paint.
Martin
Martin
I use a brown Roloc disc on a 90 degree die grinder, the same ones for buffing off gaskets and just buff off the aluminum until you see the steel. Otherwise it will give you a real shitty contaminated weld. All semi exh and intercooler pipes are made of that stuff and I've welded a ton of it over the years.Later this week, I want to weld a exhaust flange on and get a new cooler.
Speaking of that how do I weld on the flange with my mig, I'm not sure what kind of pipe was used. I don't think it's aluminum but it has the color of it? Will my 75/25 mix work?


I think I'll just wire wheel it and leave it.