Wut? Cutting the dust cap off (and OBTW, they just pop off) will do nothing regarding the camber. The camber adjustment (however small the capability...and I mean its small) is in the strut mount, slightly elongated bolt holes. The pin on the strt mount has to be punched out first though. Maybe thats what you saw him do....or maybe I am totally misunderstanding you.

The lil nub below is what needs to be punched out...to make camber adjustment to front....