Anti-seize is a must if you want to get them off some day. I use spacers when going from my 20" staggered summer 87's to my 18" square winter 69's. No issues, but I always get them balanced and the car aligned when changing out.

__________________
Dinan CAI, TB, Camber Plates, Strut Bar, Software, Exhaust, Style 87 (summer), Style 89 (winter)