After resetting the bolt rope in my Neptune 16's mainsail, I thought I'd try to improve its aesthetics.? The big rust stains, probably from sitting in a damp place under some rusty chain for years seemed like likely victims.? I sprinkled a bit of Whink (tm) (hydrofluoric acid and denatonium benzoate) which didn't seem to have any effect.? While waiting, I brushed a bit on the toilet bowl's rust stain which came off in a few seconds.? With low expectations, I let it sit on the sail for a while and worked on something else.? A half hour later, it seemed to have cleared up a bit.? 3 hours later, the stains were almost fully gone!? I carefully rinsed the sail in the bathtub and hung it to dry.? HF is really nasty stuff, so if you try this, read the instructions on the bottle and be careful!
Halden
