I had a bunch of Garandicon slings with some rust stains & alot of grime on them. I took off all the metal, and made a sudsy batch of laundy detergent & water and soaked them in it overnight. The next day I fired up the powerwasher and layed them flat on a stale walkway. I stepped on one end and blasted away. You wouldn't believe the river of brown crud that flowed out of those slings...Did both sides, hung em up to dry in the sun and they look new...
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