Agreed with all who have suggested replacing your fluid. With 27k on the bike, the fluid needs to be replaced. I think a lot of folks who have attributed the new brake lines as solving the problem are forgetting that.... if you upgraded your lines you obviously replaced your fluid too ;)...
Yep it works and I do it often on my entire helmet after I've cleaned (it's not for cleaning, only polishing/water resistance). Much cheaper than Plexus for the same results. Make sure you get the PLAIN LEMON PLEDGE, not the other varieties such as almond or whatever.
Works on TREATED...