what grade 3M ColorQuartz?

  • We are currently upgrading MFK. thanks! -neo
i use S grade with my ray. T grade is larger granules, almost like small gravel pieces, but much more abrasive.

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yeah, t grade is gravel-like.

I'd say the s grade would allow the rays to bury themselves easier. With rays soft bellies, the less abrasive the better.
 
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