Hi Neale, I've been wrestling with my knock offs all weekend having no luck with WD40 and Kroil...after reading these posts today and not having any acetone on hand and I was already too grubby to drive over to the hardware store I decided to try some starting fluid followed by Marvel Mystery Oil.It worked like a charm...Starting fluid sprayed on hub followed by dribbling some MMO then sprayed starting fluid again followed by another drizzle of MMO...after 5 minutes the hammer wacks finally did something...good luck...
