Hello Luis, in the EAA "HOW TO" series book "Aircraft Building Techniques WOOD" page 24 show plans to build a hand held scarfing sander using a drill, a small sanding drum (available from Sears) and scrap plywood. I have made scarfs on plywood for wooden boats using a small had held plane , it takes a very sharp blade, a nice flat work bench, a straight edge to check your progress and lots of patience. If you are using the newer glues such as epoxy then I don't think that the warning about not sanding the joints to be glued is as critical, you can use a scraper to go over the sanded joint if it makes you sleep better. Ray Romeu \ "MotorcycleShopper.com" <mshopper@cfl.rr.com> wrote: FlyBaby Hi guys: I've been making practice scarf joints without a lot of success. First I made a jig where I placed a belt sander upside-down on a bench and built a table and guide fence on it. That did not yield acceptable results as I had no way to keep constant pressure on the plywood.