Shaving question

ok so im gonna shave my back bumper off and weld in a steel rollpan. my question is do i have to put bondo all over the roll pan or just the part where i weld? plz help

you should put it far enuf out so that it feathers out..and i would hope not all over it....

wat do you mean by "euf out so that it feathers out?" so only where i weld?

THE BEST WAY TO DO IT IS WELD IT THEN PUT SHORT HAIR FIBERGLASS OVER THAT THEN BONDO BUT NOT THE BONDO BRAND IT SUXS THEN POLLY FILL IT THEN PRIMER IT WILL NEVER CRACK OR SHRINK.