Join Date: Mar 2001
Location: Munich, Germany
Forgive me if this is common knowledge/practice to you illuminati but I lucked out with this and have to share.
While etching the concrete in the garage for a planned painting, I ended up with some extra Muriatic Acid. This is the same stuff that's used to adjust the pH in pools; just very concentrated and in liquid form. I picked it up at Home Depot.
Anyway, there were a few pieces of my car that needed cleaning and paint stripping and I opted to try the acid rather than the wire brush/stripper method. After diluting the acid with about 5-6 parts water, I put some parts including timing chain cover, bumperett mounts, lots of nuts and bolts, etc. in the solution for a few hours. Looking at them afterwards in the bucket I was a bit disappointed however; no visible change.
That all changed when I hit them with a garden hose - every bit of paint, rust, oil, undercoating, and dirt came off. Better yet, the metal looks GREAT. I was a bit concerned about the Aluminum timing chain cover but it looks the best of them all. I'd imagine that the metal has been slightly etched as well and would take well to painting once well washed.
If you give it a shot, use gloves and do it outside. Be safe with this stuff as it's REALLY nasty. SWMBO was using some undiluted stuff that ate noticebly though concrete in seconds.
I hope somebody finds this trick handy,
"Ah the Luftwaffe; the Washington Generals of the History Channel" - Homer Simpson
1967 Mustang Fastback; originally an A-Code, 4-Speed car now with a 373hp & 340ft-lb 302, Tremec 3550, JMC hydraulic clutch, SSBC front brakes, 9" Versailles rear with 3.70 gears, Trac-Loc, and discs. Original color Acapulco Blue on Black. Repaired door rust, new cowls, new floors, quarter panels patched. Total cost... god only knows.