I did tape off on the previous paint job but I didnt on this one..I dont use the #s that much, I get out and get it set up at about 100yds and I can change it easy without looking at the #s.Only takes a second to tape them off if you want..Dont be scared to paint the AR..It's my go to gun and I bet I could sell it for more than it's worth with the Dura job that it has..even though its not going anywhere..ever...Paint away and if it dont look right paint it again.Practice on some cardboard or something first. I just recieved the Lforce and painted the base color off the gun, then I mounted it and sprayed away, I like to try to match camo with the rest of the gun at one time but sometimes you get new additions..