Thread: Sanding question

Tweet

you did not say any thing about thick filller and cracks? at this point yes dig it out . but i would not use a air boad . i would use stripper or a cup wheel on a grinder the metal may have been over sanded all ready and will get thin fast with 36 grit . if the body work is not good the prep is not good . i did this for a living for many years .i have seen filler put rigth over shinny paint and stick .on the new car you do not cut in to the steel with 36 grit you work the bent out sand out to 80 grit bust off the clear and fill with filler . why do you do it this way??? new car have anti corrosion coating on the steel and alot of the filler will not stick to it .the E coat primmer sticks better that why you do not cut in to the steel BUT sometimes you do then the new filler work good for this like Z grip the steel on new cars is junk it needs the corrosion coating on it to live cutting thru this invites rust to form