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Motorboatin' SOB, Headlight Cleaning Guru
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will sand damage a set of magnesium valve covers? i heard that the irregular shape of sand can crack or put tiny holes in covers. is this right?
 

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use glass bead at a lower PSI like 60-80 and you'll be cool. You can also use baking soda but it has a hard time removing paint if thats what your trying to do.

Brad M
 
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