This is a good video (although what he calls salt build up is actually aluminium oxide formed when aluminium 'rusts')
https://m.youtube.com/watch?v=FNz00OTRLzM
Keep a spanner across the caliper when actuating the levers to avoid pumping the pistons out too far. Everytime I manage to pop one of the pistons out. It p***es brake fluid everywhere, can be tricky to get back in and will need you to rebleed them.
...oh yeah.. and now you have your reservoir with less fluid in, just be careful when you pump the pistons back out, the reservoir doesn't run dry and you pump air into the lines!
https://m.youtube.com/watch?v=FNz00OTRLzM
Keep a spanner across the caliper when actuating the levers to avoid pumping the pistons out too far. Everytime I manage to pop one of the pistons out. It p***es brake fluid everywhere, can be tricky to get back in and will need you to rebleed them.
...oh yeah.. and now you have your reservoir with less fluid in, just be careful when you pump the pistons back out, the reservoir doesn't run dry and you pump air into the lines!
-suck-squeeze-bang-blow-