In a message dated 4/14/02 12:57:08 AM Eastern Daylight Time, tsmit@shaw.ca
writes:
> You're going to hear this lots, but sandblasters warp sheetmetal because
the
> sand
> impact is so high that it stress-relieves the metal.Get a refinishing shop
> to
> plastic-blast your body - getting my hardtop done inside and out cost $120
> canadian, that's like $80 US. I'd removed the top layer of paint with a
> chemical
> stripper but it wouldn't touch the factory black lacquer underneath, so I
> took it
> to the plastic blasters.
> They did mention that holding the sandblaster gun at a shallow angle could
> help
> prevent warpage but that's just waaaay too much of a risk
Theo is right, be careful blasting sheet metal. Lower pressure with high
volume flow rate works best. Blasters do a fine job on non-sheet metal parts
such as castings, et al.
BTW, consider making your own cabinet. I made one from plywood, two by 4s,
and the accessories such as foot pedal, gloves and gun from TIP industries.
Cost me less than $200 and it can hold a 4 foot long part in it.
Rob
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