Re: Europa-List: Trouble fitting wing spars to cockpit module

[Ron Parigoris <rparigor@suffolk.lib.ny.us>]

As far as lapping goes:


"IMHO. DON'T USE GRINDING PASTE. the bushes are alumimium and you'll not
wash
out the paste because grains of abrasive will embed in the bushes
permanently."

This is true with Diamond or real hard abrasive compounds.

www.mcmaster.com sells some lapping stuff that starts out as a lap, then
turns to polish then to nothing. I have used this sucessful lapping
aluminium on Cox 020 reedvalve racing motors. also works on steel. It
does not remove much before it ends its ability to cut.

Ron Parigoris