good morning

I'm no export but also think polishing can be counter productive - honing a car cylinder or pneumatic ram actually produces small scratches that hold lubricant, where as a piston seal on a mirror finish would presumably wipe off the lubricant and make it run dry. If you do polish your compression tube please chrony before and after and share what impact it has so we can all learn something.

Wet and dry on a wooden dowel (broom handle) alternatively could use a brake cylinder hone.

I used 2000 grit wet and dry on my gamo with no ill affect on fps.
Petrolium based stuff may leave behind a Residue that between the heat generated by the piston (its way up there) and the pressure generated causes an ignition of said substance
This causes uneven pressure over several plus shots, which at worst will
damage piston seal at best throw your point of impact off untill substance is burnt out.
Check the ingredients for petroleum/flammable products.
Watch how much you take off when polishing it. It is after all the seal chamber.
There are air gun friendly polishes, I'm a bit more number 8 wire.
There are oils specifically for oiling the chamber, you will need of these for when you oil the chamber and seal or molygrease.
My question would be how fine is autosol, if it has chemicals that are flammable do you have something to clean it out with, throughly, that doesn't have combustibles.
There ppl here who can give you more experianced advice when they read it.
You get the spring made?


Edited by kruzaroad - 06 Dec 2022 at 2:43pm

thamks billbob -much appreciated .guys -about to polish the chamber in this rifle .ok to use autosol polish on a mop with electric drill???though t id make a few 4x2gunpatch wads -put the stuff on and give it a spin.hope to smooth chamber out looks a bit rough and hence less wear on piston /seal.