Quote Originally Posted by Bob Parmenter View Post
Just to add, on something as large as a firewall, to avoid the arc lines Pat mentioned use a guide bar............a pipe, board, whatever that you can clamp across. Make your pass with the abrasive, then move it down for the next pass, repeat.
yep we used alot of masking tap but that was on the rims . so a guid rail will help yard stick or some thing like that. not to mark up your bush marks