I have done a bit of reading on how to clean brake caliper pistons, and found an article that said you could use fine wet and dry to clean corrosion off them [http://www.motorcyclenews.com/new-rider/choosing-kit/2006/november/jan26-05-how-to-service-brake-calipers/].
as it suggested using 1500 grit wet and dry, I decided to be cautious and start with 3000 grit. I cut the wet and dry into strips about an inch in width. I put some wd40 onto a strip and started polishing the rear piston.
After quite a while I started to notice the difference. it was getting cleaner. well, it was working, but it was going to take a long time. well, I was patient and I really didn't want to rush it and ruin the pistons. Over the next couple of weeks, I polished all of the pistons using the 3000 grit wet and dry.
As it seemed it was going to take the rest of my life using 3000 grit wet and dry, I decided to take a risk and bought some 2000 grit. yep I was really pushing my luck here. I cut the 2000 grit into strips the same as the 3000 grit paper, and dd the same process with wd40 and then polishing. it did clean the crud off a little quicker. I would still have liked to clean them up a bit quicker, but I wasn't willing to risk trying a coarser grit, so I just kept polishing with the 2000 grit wet and dry.
So now it's just a case of polishing the pistons and see how well they clean up.
as it suggested using 1500 grit wet and dry, I decided to be cautious and start with 3000 grit. I cut the wet and dry into strips about an inch in width. I put some wd40 onto a strip and started polishing the rear piston.
After quite a while I started to notice the difference. it was getting cleaner. well, it was working, but it was going to take a long time. well, I was patient and I really didn't want to rush it and ruin the pistons. Over the next couple of weeks, I polished all of the pistons using the 3000 grit wet and dry.
As it seemed it was going to take the rest of my life using 3000 grit wet and dry, I decided to take a risk and bought some 2000 grit. yep I was really pushing my luck here. I cut the 2000 grit into strips the same as the 3000 grit paper, and dd the same process with wd40 and then polishing. it did clean the crud off a little quicker. I would still have liked to clean them up a bit quicker, but I wasn't willing to risk trying a coarser grit, so I just kept polishing with the 2000 grit wet and dry.
So now it's just a case of polishing the pistons and see how well they clean up.
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