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isRR said:
Read this:


those results are interesting but as one or two guys in that thread said.
WD40 is a penetrant.
although it has no effect on the O-ring, it has the potential to get past the O-Ring and dissolve the lubricants found within.

fwiw i think kerosene, a chain brush and toothbrush work a treat and cut through road grime a treat.
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