If I'm reading what you're saying right, then surely pretty much every time you pull your brake you'd basically be lubricating those points? In any case, like I said before - you can lube sticky pistons wherever they may be on your brake using a spray of GT-85 or similar. It's easy to do, and works fine. Completely cured any problems I had with sticky pistons when I had them last (which was years ago now). Other than that, water isn't going to be any harm to your seals or virtually anything in your brake, so there's pretty much no reason to not use it... Mike - re: contesting your posts, did you see the bit where Psycholist pointed out the lubricating properties of water, something you said it didn't possess?