I’m in the middle of that 4-63 220e fettle and I decide to try citric acid on the frame. After reading a ton of threads on how to use it and what to use it on and how long to soak. I made a solution of 2 gallons of hot water with 4tbls of citric acid and soaked the frame about 20 min, then steel wooled it with Mother’s mag polish. Turned out amazing, then I decided to do the whole burner assembly. Let this soak about 15 min until the brass was showing some pink and hit it with Mother’s and 0000 steel wool. Again, the results amazed me. This was way better than evaporust and carb cleaner soaks I’ve used in the past. Today I was stripping the fount for a repaint and thought what the heck, pulled the valve out and soaked the fount. I had already tried an application of stripeze but most of the paint didn’t budge. Let it soak for about 30 min and the paint came off easy with a brass brush. Had to resoak for another 15-20 minutes to get some of the stubborn paint on the bottom to release.
I was afraid to soak the valve in the citric because of the packing, but I did soak the filler cap, with the gasket, go figure. Didn’t seem to hurt the gasket. So, will citric acid harm the graphite?
Rob in NC
The next experiment will be on that recent 530 that I picked up a couple of weeks ago. Was thinking of a short dip of the closed fount with the sw/mother’s treatment. I tried to take the frame off but the screws were so rusted it was clear they weren’t going to survive extraction so I stopped and just cleaned up what I could reach.
MilSpecOps Syndicate #1962
Coleman 275 Appreciation Syndicate #1962
Sometimes we are the windshield, Sometimes we are the bug...