Starting this week I’m going to wipe down the G-12 tubing inside and out with lacquer thinner. Every bit of the “release” and other contaminants need to be completely removed before sanding with 220 grit aluminum-oxide sandpaper. This is to prep the G-12 to best accept the U.S. Composites thin epoxy on the interior and primer/paint on the outside. For the stringers I’ll be using the Pro-Set epoxy but will discuss this once I get to that point on the build.
Another thing that needs to be done is removing a very thin layer on the OD of the centering rings. I ordered them just slightly too large. Haven’t measured exactly how much needs to be removed but it’s minor.
I’ve got a belt sander to do this work so it should go quickly.
After cleaning and sanding the G-12 I’ll start building the “coupler assemblies” which are the internal strength of the rocket. I’ll post pics once I get started so you can see what I’m talking about.
As always I’m on this forum to share the build and to listen to your ideas/suggestions. Sometimes you guys come up with a way of doing something that is faster and/or more accurate.
Thanks.
Chuck C.
I have one of these from Harbor Freight. I use the disc sander it makes short work of sanding CR’s down to size.
https://m.harborfreight.com/4-inch-x-36-inch-belt-6-inch-disc-sander-97181.html