Date: Sun, 19 May 1996 16:16:15 -0500 From: Larry Jansch Subject: COZY: I'm stuck... ... literally. I used Bondo as per Nat's instructions to attach boards to hold the shape of the speedbrake during glassing and final fitting to the fuse. (That went very well, BTW.) I have never worked with Bondo before and I have no idea how to remove it without damaging the fiberglass skin. The books say to chip and/or sand it off. Really? With what, a chisel? And how will the skin react to all this? My sincere thanks in advance! -- Larry Jansch Cozy Mk.IV Plans set #461 Magically in Ch. 9 Date: Mon, 20 May 1996 12:45:37 +0000 From: Eric Westland Subject: Re: COZY: I'm stuck... Larry Jansch wrote: > > ... literally. I used Bondo as per Nat's instructions to attach boards to > hold the shape of the speedbrake during glassing and final fitting to the > fuse. (That went very well, BTW.) I have never worked with Bondo before and > I have no idea how to remove it without damaging the fiberglass skin. > > The books say to chip and/or sand it off. Really? With what, a chisel? And > how will the skin react to all this? My sincere thanks in advance! > > -- > Larry Jansch > Cozy Mk.IV > Plans set #461 > Magically in Ch. 9 Whenever I can, I bondo with particle board. That way I can get most of the wood off easily. Then I just sand the rest off with a 40 grit disk chucked up in my drill. -eric Date: Mon, 20 May 1996 07:59:17 -0500 From: tims@enet.net (Tim Sullivan) Subject: Re: COZY: I'm stuck... Larry Jansch wrote: >... literally. I used Bondo as per Nat's instructions to attach boards to >hold the shape of the speedbrake during glassing and final fitting to the >fuse. (That went very well, BTW.) I have never worked with Bondo before and >I have no idea how to remove it without damaging the fiberglass skin. > >The books say to chip and/or sand it off. Really? With what, a chisel? And >how will the skin react to all this? My sincere thanks in advance! I'm right where you are on the speed brake. I used a course wood file to take most of the bondo off then finished with 80 grit sand (by hand). You will have a little bit of grey left behind but that won't hurt anything. Tim Sullivan (tims@enet.net) Phoenix, AZ | * | Cozy MK IV Builder #470 |-----(/)-----| The journey begins 8/10/95 / \ Current Status: Ch 9 o o Date: Tue, 21 May 1996 00:10:56 -0400 From: StetsonE@aol.com Subject: Re: COZY: I'm stuck... In a message dated 96-05-20 06:47:36 EDT, you write: >... literally. I used Bondo as per Nat's instructions to attach boards to >hold the shape of the speedbrake during glassing and final fitting to the >fuse. (That went very well, BTW.) I have never worked with Bondo before and >I have no idea how to remove it without damaging the fiberglass skin. > Often the problem is how to separate the boards from the part without damaging the part. Just knocking off the boards isn't a good idea because it might cause a delamination. I use a hacksaw blade and cut into the bondo blob on either side of the board to weaken the joint, then gently apply a twisting motion to break the rest of the joint. Then do what everyone else has already suggested - sand the rest of the blob off with coarse grit sandpaper. You'll still have a little bondo down in the weave, but don't worry about it.