I'm not a fan of spacers, they effectively shorten the wheel studs hampering the thread engagement. Now, if you have sufficient stud length to have proper engagement when torqued (Rule of thumb is the diameter of the bolt, so a 1/2" bolt needs at least 1/2" thread engagement.) then you'll be OK.
But I'd try to figure out why it's rubbing. Has a panel come loose or moved? Could the panels be held down by a new screw?
Now-2014 Sierra 346RETS 5er BUB
Then-2002 Keystone Springdale 286RLDS TT
Nights camped in 2014-28, 2015-127, 2016-10