Upper Control Arm Mounting Stud Convex Washer Removal

[pjmoreland]

I bought a set of convex/concave washers that are thinner than stock from Performance Online to decrease my camber. I went to remove the originals, but the convex washers seem to be pressed onto knurls on the studs. I tried hammering a wedge shaped chisel behind them, but they would not budge. I'd like to remove the originals without destroying them. Any suggestions?

https://www.performanceonline.com/19...-Control-Arms/