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Discussion Starter · #1 ·
i am learning to olish metal with some toyoto cam covers, however the finish is not as goo as i expected.
there appears to be blck dots in the alluminium like corrosion.

i have a grinder converted into a buffing machine
first of all i put paint stripper on them
had then sand blasted
i sanded them down with 80grit sand paper
then
120
240
400

then began with the buffing
sissal wheel
stiched mop
g cloth wheel

was just wondering if anyone can help me on how to get better results. it did take me two days to get this far
they were lovely and smooth
 

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Discussion Starter · #3 ·
does that really make a difference as it just feels like felt to me.
it bugs me more the fact that those black blobs wont come out
 

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Yes, buffing just polishes the surface that's there, the 400 grit is pretty coarse so the grain is going to remain. Use the finer grits and the surface will be cleaner before you start polishing. Age old saying, fail to prepare, prepare to fail. (Jeez that last bit sounds pompous. :apuke:)
 

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Its most likely a porus or poor casting with lots of air holes that collect oil rather than the the grades of paper used.

My sisal mop will polish things up straight from a fuzzy wheel with no problems at all so I personally wouldn't bother pre prepping the part for polishing just rip the paint or whatever off & whack it on the mop.
 
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