RE: Waxing trad string
My concern would be the paint thinner might weaken the string, but I've heard Rob Lee recommends doing this for a quieter string. Getting the dye and wax out will make the material softer, so I guess it would make it quieter also.
Wouldn't worry me removing the wax--wax isn't what holds a flemish string together. It just makes it easier to make a flemish string (makes it tacky, holds the bundles together while you are working). I'd guess that removing the wax will make your string wear out faster--wax is a lubricant that helps reduce wear.
I haven't tried it--so far haven't needed to. May try it sooner or later, just to see how it effects the string.
Chad