What abrasive grit is not used when clearing paint off Aluminum?

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Multiple Choice

What abrasive grit is not used when clearing paint off Aluminum?

Explanation:
When removing paint from aluminum, choose an abrasive that strips the coating without severely damaging the metal surface. Aluminum is relatively soft, so very coarse grits can gouge the surface and create scratches that lead to corrosion or more finishing work. The mid-range to fine grits listed (40–60, 80–120, 120–180) are commonly used to remove paint and then smooth the metal in prep for priming. The extremely coarse range (21–32) is too aggressive for aluminum and would gouge the surface, which is why it is not used.

When removing paint from aluminum, choose an abrasive that strips the coating without severely damaging the metal surface. Aluminum is relatively soft, so very coarse grits can gouge the surface and create scratches that lead to corrosion or more finishing work. The mid-range to fine grits listed (40–60, 80–120, 120–180) are commonly used to remove paint and then smooth the metal in prep for priming. The extremely coarse range (21–32) is too aggressive for aluminum and would gouge the surface, which is why it is not used.

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