john B. wrote:
On Wed, 1 Jun 2011 12:28:26 -0500, "David Courtney"
wrote:

"john B." wrote in message
...
On Wed, 1 Jun 2011 11:05:43 +0000 (UTC), xpzzzz wrote:

On Wed, 01 Jun 2011 16:33:43 +0700, john B. wrote:

I'm in the process of rebuilding a bicycle frame and am left with some
minor dings and scratches which I want to fill and fair. The tubes are
rather remarkably thin and I really do not want to use a file to clean
them up. My idea is to use lead solder as a filler and my problem is
that I have no idea what to use for flux.

The reason for using a metal filler is that the frame will eventually be
powder coated and the preparation used here is a good glass bead
blasting and I don't think that conventional painting fillers would
stand that, or the high temperature baking.
Use LabMetal: http://www.alvinproducts.com/Products/Products.asp?ID=1


My powder coating guys tell me that they cure at around 200 degrees(C)
minimum.


As someone who did a LOT of powder coating (12+ years) I can tell you
soft lead solder will not handle the heat of the powder cure.

However all is not lost. Silver solder or brazing will handle the heat.
OR there are special high temp fillers that most powder coaters can get
that will work.

Also make SURE that ALL threaded holes, bearing surfaces, anything you
don't want powder on/in is masked very well. Powder does NOT come off
easy. Get it in threads and you will have a ton of fun trying to get it out.


--
Steve W.