Milimetr, I don't think the PE 'thrust pad' will be affected by the particles in the Spindle Oil if you want to try it. Only a tiny portion of the rounded end of the bearing shaft contacts the thrust pad. TT makers used to use a ball bearing as a thrust pad, but found they made noise, as the ball bearing and/or the end of the shaft could never quite "find" a fixed spot to bear against each other, and so would continually 'wander', sometimes at an audible frequency! My Goldmund TT has a Teflon thrust pad and it isn't going to wear out. A small number of particles might have become embedded in the Teflon, but wouldn't cause noise or produce wear -- so no worries. I think only large rotating or sliding surfaces of plastic against metal, or maybe even plastic against plastic, should be avoided.
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