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MG MGA - Carb chamber polishing

Any tips on how to polish / recondition the chambers so they sparkle like new?
Jeff Bennett

The SU piston chambers were not polished when new, they are normally dull. Some people highly polish, or even chrome them, but this is not original.


Mick
M F Anderson

If you want them highly polished, you can get a friend with reloading equipment to put them in his vibrating polisher. It will do wonders.
mike parker

Jeff, I did mine by hand for hours; and they pretty much look the way they did before I started the polishing.
Dennis Suski

I did mine with a buffer in a drill but only brightened them up.

I copied the following from another site. It is from Jimmy Hutton who is the expert in rebuilding SU's and polishing to a mirror finish (image attached):

"I use a fine file and knock off the imperfections. Then either chucked in a lathe, or drill, sand in 2 directions starteing with 220 and work down to 600. Then use a doubled up 6" buffing wheels, and fairly coarse compound. I use #2 or brown, and clean the wheel often. Switch bodies if they begin to heat, and go through a rotation of the 2 so you don't lose track. The buffing direction needs to go in diagonals, and then parallel, and then finishing with diagonals. Then a really good double rinse in lacquer thinner, then spray out with Gumout, then a final rinse in totally clean lacquer thinner, with a new terry towel and immaculately clean hands doing the final cleaning. From then on out, Autosol ought to do a good job of maintaining."

"It is a brutal 2 hour job, but everyone seems to like the results. Sheila always calls me her favorite black man every night, as that is the last job I do at night smiling smiley"

"The variance in alloy is amazing. Some polish far better than others, and those are generally the softest. The best internal condition is generally of those that are a tougher alloy, but they also will not polish up as well."


Jim Ferguson

Wow!

I think I will just wipe my down with a cloth and then call it "original".

Interesting tips regardless. Thanks.
Jeff Bennett

This thread was discussed on 04/03/2009

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