Houdini Posted April 5, 2005 Report Share Posted April 5, 2005 (edited) I know people have used Bondo before to make cusotm sanding blocks and was wondering how well these hold up. Does any one know if the Bondo is durable or if it will crumble and warp/break with any type of pressure? I'm trying to find something that is comparable to the strength of wood at least. I was also considering using an epoxy resin such as what is used on boats FYI: If you want to make a sanding block using Bondo: I got this technique from Taunton's Complete Illustrated Guide to Finishing by Jeff Jewitt. Great book on finishing, although I haven't tried this particular techinque yet, it looks pretty good. Begin with a 3 to 4 inch long section of a moulding or fretboard or whatever shape and apply a thin coat of furniture paste wax to it to act as a mold release. Using scrap wood or cardboard, make a 4 sided rectangular box to act as a form for the bondo. Put the fretboard shape into the form with the fretboard side facing up. Mix up the Bondo and put it into the form making sure you don't leave any air gaps. Overfill the form with the bondo Take a block of wood that is slightly larger than the form and drive 3 screws into it so that the heads project out of it about 1/4 inch. Press the wood with the screws into the bondo. The screws act to hold the wood block to the bondo. When you press the block into the form, make sure that some of the bondo squeezes out. This will ensure that there are no gaps between the fretboard and the bondo. After 5-10 minutes when the bondo becomes rubbery break the form off of the bondo and take the fretboard shape off. Let the bondo cure. If it distorts, put a piece of fine sandpaper on the fretboard shape and run the new bondo sanding block along it a few times. When the bondo is dry, spray some truck bed liner (available in spray cans at hardware stores) on the form to act as a cusion for sandpaper. Now just use Pressure Sensative Adhesive (PSA) sandpaper and attach it to your form and you have a custom sanding block. Edited April 5, 2005 by Houdini Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.