Brake calliper rebuild

[Random Dan]

I have disassembled my front callipers to rebuild them.
The pistons looks in good shape with no obvious scrapes or pits.

They do have a bit of a ring of what looks like baked on seal or some such.
Am I safe to give them a light polish with some diamond paper to get the marks off?

 

[Ceylon]

It should come off with some tcut. Just make sure you remove all traces of the cutting compound before reassembly.

 

[JoeLanger]

I've done 3 or 4 sets of calipers now and every time the piston has needed chaingndue to pitting. Not done the FD ones but they're usually pretty cheap so I normally just change then

 

[Random Dan]

We had some 12 micron wet and dry at work so I ended up using that.
I think it was just dried/burnt seal and came right off.

Rebuilding the callipers was strongly satisfying.

 

[JoeLanger]

We had some 12 micron wet and dry at work so I ended up using that.
I think it was just dried/burnt seal and came right off.

Rebuilding the callipers was strongly satisfying.