Re: Blasting Garnet - What Grade?
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Blasted our 6mm plate hull with 30/60 80 grade garnet, would be a suitable for a little heavier steel, like a truck chassis if that's all you were using it for.
Brown aluminium oxide is a lighter grade for surface prep.
Boatyard supplier was Blastone in Silverwater don't know if they are still around.
Most boatyards have all gone to beadblasting lately.
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