Which of the following is NOT a listed blast-cleaning level?

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Multiple Choice

Which of the following is NOT a listed blast-cleaning level?

Explanation:
Blast-cleaning levels describe how clean a metal surface is after blasting and before coating. White metal and near white metal specify very clean surfaces with little to no corrosion products left, while brush off is a lighter blast level that removes loose scale and dirt but leaves more oxidation. Primer, on the other hand, is a coating applied after the surface has been cleaned; it is not a cleanliness standard itself. So primer isn’t a blast-cleaning level, whereas the other terms are.

Blast-cleaning levels describe how clean a metal surface is after blasting and before coating. White metal and near white metal specify very clean surfaces with little to no corrosion products left, while brush off is a lighter blast level that removes loose scale and dirt but leaves more oxidation. Primer, on the other hand, is a coating applied after the surface has been cleaned; it is not a cleanliness standard itself. So primer isn’t a blast-cleaning level, whereas the other terms are.

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