When you're done you'll understand why they charge you $450...
- first use a selection of files and cartridge rolls to take the casting
lines and really high spots down
- hand sand with 220 wet-or-dry (wet) until the casting marks are gone
- hand sand with 400 wet-or-dry (wet) to take out smaller scratches
- put a buffing wheel into a bench grinder, use some coarse polishing grit,
and lean on it with the manifold until all the big areas are done
- get a small buffing tip for your drill, die grinder, or Dremel, and polish
all the nooks and crannies
- hand touch up to remove the buffing compound
Now don't ever touch it with your bare hands.... ;)
I've done this on several castings (valve covers, alternator case) as well
as 6061 and 7075 billet pieces and you can get a very nice shine, but the
results are strictly proportional to the amount of effort you put in.
Theo
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