I think that shouldn't hurt your glocks in any way.i have had over 2 dozen glocks,some with the copper compound left on and some that was cleaned completely before the 1st shot.i could never tell a difference in either gun with or without.
By the way,on my sw40g i use just a small dab of silicone grease (intended for brake calipers) on the sear contact points,it seems to make a difference in the smoothness of the trigger.but remember,just a small dab,too much and you will end up with a nasty concoction of dirt and grease after firing about a hundred rounds.