Brake caliper piston; renewal

[nominous]

So if replacing a piston it's put a drift through the hole and push the piston out??????????????

As I said, works for the hondas as the hole is exposed to allow it and has a banjo connection. But my passat cannot do that as the hole for the hose is at an angle and a tiny orifice.
Did this many times before I made the tyre inflater thingy.
Incidently the back side of the pistons are often not coated and it's difficult for something to rust when immersed in brake fluid.

do not grip the caliper piston on the outside as this will cause chrome plating damage

The bit not protected by the rubber boot which 9/10 will have rusted ?
I wouldn't worry too much. And then if removing the piston which is found to be ok, I'd tape off the rest of it then wire brush and paint the tip to protect it.


FYI, a new piston for the passat was 9quid delivered from ebay. Faffing around servicing a piston, not worth it IMHO. Buy new piston and seal kit.
A job I've been putting off for ages, when I finally got to it the piston so pitted that the brake fluid was leaking around it, but the seals were intact.