[DonC]

There have been a number of posts on stuck spinners over the years. Some with good advice while others have been serious tongue in cheek and pretty funny. The upshot seems to be to use a lead mallet (I use a Mother Thumper) and always double check which way you're hitting the spinner.
Can't emphasize enough the use of anti-seize when you put it back together. I use a stainless steel spinner so I've reduced the effect of like metal fusing and not so worried about breaking an ear when I hit it but the advice from Super Performance on getting them on and off is very sound.
Never used the Finish Line socket but it looks like you may be able to get an impact wrench on them to help with first time removal of the spinner.
DonC