more agressive chemicals are ruled out because of possible damage and abrasives are unsatisfactory as the aggregate lodges in surface scores.

can you guys explain the meaning of the sentence? especially meaning of lodge.
是什麼意思

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They won't use chemicals because they can damage.
They won't use abrasives because the stuff can lodge (get stuck in, embedded) in surface scores (scores = little dings, dents, holes, etc. - if you use something that is abrasive it will mar a smooth surface often).