Sandblasting a frame

Michael Tissington said:

I have a fairly new bike that needs some extra braze-ons to it.

Are there any issues with having the frame sandblasted and a new powder coat
put on it ?

Thanks.

yes. if the tube walls are thin, and you're too enthusiastic with the
sand, you run the risk of removing excessive material and weakening it.
best use a chemical remover.

Try bead blasting (uses plastic beads) that will not remove metal but will
remove coatings. Or try Soda blasting, same advantages.

"Michael Tissington" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I have a fairly new bike that needs some extra braze-ons to it.

Are there any issues with having the frame sandblasted and a new powder
coat put on it ?

Thanks.

Grolch said:

Try bead blasting (uses plastic beads) that will not remove metal but will
remove coatings. Or try Soda blasting, same advantages.

"Michael Tissington" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I have a fairly new bike that needs some extra braze-ons to it.

Are there any issues with having the frame sandblasted and a new powder
coat put on it ?

Thanks.

I'm not a pro, but I found just sanding with varying grits of sandpaper
to be very effective at removing paint, without the need for equipment.

Of course, if you have the equipment, then MORE POWER!

Most powder coaters have bead blasting equipment or can suggest a supplier.
Sand, and other abrasive particles propelled at high velocity impart heat,
this is usually no problem with thick base metals but if you have high-end
thin or butted tubing, especially chromoly, this may affect the temper
unevenly. Your risk. Trust me, get it bead blasted.

Grolsch

"Collin O'Neill" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Grolch said:

Try bead blasting (uses plastic beads) that will not remove metal but
will remove coatings. Or try Soda blasting, same advantages.

"Michael Tissington" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I have a fairly new bike that needs some extra braze-ons to it.

Are there any issues with having the frame sandblasted and a new powder
coat put on it ?

Thanks.

I'm not a pro, but I found just sanding with varying grits of sandpaper to
be very effective at removing paint, without the need for equipment.

Of course, if you have the equipment, then MORE POWER!

"Grolch" <[email hidden]> wrote in message
news:ODSWg.56127$E67.26458@clgrps13...

Quoted message said:

Try bead blasting (uses plastic beads) that will not remove metal but

will

Quoted message said:

remove coatings. Or try Soda blasting, same advantages.

Glass bead blasting or walnut shell media also work well.

Since it's a new bike there shouldn't be any corrosion problems. A frame
builder friend blasted an old frame from the 1950's and found that the
seat stays where full of rust holes around the rear brake bridge. They
didn't show up until he removed the paint.

Chas.