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Re: Better sail slides
Froggy, you lube a sail track, lube it and clean it, by jamming in some rag or boltrope that is soaked in a cleaner or lube, and running it up and down the track a few times. Real easy, real cheap, real simple.
Then you do it again with a clean rag soaked in McLube and shoot more McLube on your slides. McLube is basically the same as modern bicycle chain lubricant: Exotic DuPont Krytox lubricant, which is unaffected by temperature or solvents but damned expensive, diluted down in a white paraffin carrier, which won't stain sails and just "disappears" as it ages without trapping more grit or dirt, and some petrochemicals to make it all liquid.
Very different from silicone spray or WD40.
Clean track, lube track, plain nylon slides work amazingly better.
You want exotic materials? OK, order some plain T-stock from the company, tell them it is for something mundane like drawer slides, and give the t-stock to your local machine shop to do the finishing work. No big deal, don't overthink it.