General Category > Bike Builds, Rebuilds And Restorations Only
Sessantacinque GT rehab (V65 GT), frame crabbing, gear box, transmission
Pescatore:
Almost a year has gone by with slow progress.
I had the bottom frame rails, the swing arm and the kick stand parts blasted and powder coated.
I could not get anyone to blast the paint on the assembled engine, not even soda blasted.
So I decided to strip the paint the hard way, with Rust- Oleum Aircraft Remover.
I covered up all the holes, swing bearing, shaft drive, etc. Masking tape works well and does not break down with the paint stripper.
Gorilla tape is more robust, so I switched to that later on.
The spray can worked great, when it worked. It makes the stripper foam up and does a great job between the fins.
However, after a while it doesn't spray a nice stream, it starts spitting. Anyway, I also got the can and started painting it all over the engine.
Final drive too.
I go around in circles, as I treat one area, I cover it with a plastic bag while I scrape another area.
The transmission box is all clean now.
I found a lot of stains under the paint, even where the paint looked fine. I tried blasting one area with baking soda, but it doesn't remove the stains.
A bit more work on the fins. They might not come completely clean.
After all the paint is off, I am going to soda blast it with a small gun. It works well to remove stubborn paint deposits.
I was thinking of protecting the engine with a cleat coat, but with all these stains I will probably have to use paint.
Chuck in Indiana:
Everybody will look and say, "Looks good." Unless you've *done it,* those hours of labor go unnoticed. :smiley:
Looks good. :cool: :grin:
Pescatore:
Thanks, Chuck. And now that I've done it, I would not attempt it ever again.
Pescatore:
All the paint is off, except for some surface residue deep inside the fins. The blasting does not reach well between the fins.
It's not noticeable and I ran out of stripper, so that's as far as I will go.
Paint stripping with chemicals was really nasty, it might have taken a few years off my life.
The soda blasting gun worked really well, provided I waited for the compressor to recharge. It needs at least 10scfm to keep
a decent pace. I got 5@90, blast 45 seconds, wait 2 minutes.
The stains are really ugly, but I have decided not to paint it just because it's easier to keep the bare metal clean.
I tried using a wire wheel to get them off. I went though 5 wheels, and it's a slow process again.
Vapor blasting is interesting. I realized that many posters here leave it bare after doing that. I think glass peening imparts
some protection to the metal because it doesn't pit like sand does.
It sounds scary, but I just want to "erase" some of the visible stains. I would not blast the top end. If I ever need to replace the
gaskets, I will take both heads off and have them vapor blasted.
So I have been searching for people willing to vapor blast the engine assembled. Most shops around here (MA) have small blast
cabinets and can't fit the whole engine. I found a company in CT, but too expensive.
I already got the gun, so I'll give dry glass bead blasting a try. It won't give the same finish as the wet slurry, but I could buff it later... maybe?
Antietam Classic Cycle:
Home-brewed vapor blasting set-up. Check out the rig "scudman" shows in this thread (1st page, about 1/3 the way down).
https://advrider.com/f/threads/scudman-gets-another-guzzi-project.1456684/
I think this may have been the kit he bought: https://www.amazon.com/Angela-Alex-Sandblasting-Sandblaster-Attachment/dp/B0856QHK8H
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