FX impact Power Plenum Seat.

As you think or with such a quality seat,the valve can last a long time?

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Nice work Vadimas, may I ask what angle your polishing tool is and what is on the end of it. It kind of looks like pieces of sand paper. I have one that I'd like to clean up. 

Jking

The angle is 48 °.
there is glued paper 1200 for wet work

then I glued 2500 paper,it’s a very meticulous job

I used ballistol grease instead of water when polishing, it does not allow the paper to burn quickly.