I got my hub caps on (see recent thread about bending wheel clips). Now getting them off is the next issue. I was warned by a mechanic specializing in classic VWs that hubcaps from many aftermarket suppliers have a design flaw. One that’s easy to miss.
The inner lip on OEM hubcaps is rolled over all the way. The inner lip on mine (and maybe yours, too) only rolls over on itself part way, leaving a valley all the way around. And it is this valley that can catch on the end of a clip, thereby locking the hubcap in place. I got my test hubcap off with some luck and a few small chips of the wheel’s powder coat.
Moral of the story: listen to your mechanic.