Teflon coated brake pistons

[Mactriple]

I have just removed the brake pistons from a set of Scarab callipers that I want to restore. The pistons are in good condition but the surface coating has worn mainly outside the piston seal. The surfaces look to be Teflon coated. So:-

Question 1 Is Teflon likely to be the surface treatment?
Question 2 Is Teflon DOT 4 brake fluid resistant?
Question 3 Has any forum member had Teflon coating done and if so what was the result?

Ian

 

[Vince]

I had the slide in the Delordo in my 93 TE 350. That worked great,took up the wear and slide beautifully  so I got the slides in my Laverda done,not so good. They ended up with lumpy blisters on the surface. Don't know if it was an application issue or a material issue. I couldn't even file them smooth.

 

[sfcpiet]

Ian,

Lockheed bits are a direct replacement for many Scarab internals, might be a far easier/cheaper option.

Not sure that the coating stuff is teflon, more likely hard-anodised alloy.  That it has worn shows up the crap quality of Scarab components.  I have a set of Scarab calipers needing an overhaul as well, have decided to replace them with NOS Fontanas.

piet

 

[Mactriple]

Piet,
On casual inspection the Lockheed pistons that I have seemed the same size as the Scarab ones. I nearly made a mistake and ordered a couple of sets from Andover now the value of the Pound is alright. However, at the last moment I tried fitting the Lockheed pistons into the Scarab bodies and they don't fit. I am lucky that I am doing up a set of Lockheeds as well as the Scarabs. Thanks anyway!
Ian