no problem Roger..John (theastronaut) showed those in one of his posts and I stole it from him...you can see one of them laying on the tailgate in the last pic..that one is simply 1/4" thick plexiglass that's 2"x6"...I radiused the corners and beveled all the edges on the sandpaper side so they wouldnt dig in...on the topside I used 3 pieces of duct tape to make a handle..and I'm using adhesive back sand paper..
I also made one 12" long from 1/4" and have a variety of sizes and shapes I made from 1/8"..
heres the thread where John shared them...
http://67-72chevytrucks.com/vboard/s...=fender&page=2
you can see the pics of them upclose on page 2
and heres how mine look from the end..
red=sandpaper
gray= plexiglass with radius edges
black=duct tape...