3. Stripping The Adhesive
I haven't done an update on the Blonde Rumble mod the last couple days, due to life in general and a little issue.
The four sides (top, bottom, left and right) I've been able to sand the old adhesive off. Using my orbital sander it will form up into tiny pills that just roll out from under the sandpaper, as long as you keep the sander moving. Just every few seconds of sanding and brush the pills away. I'm not sure how much of it is the lacquer on the MDF or the adhesive or both. It appears these sections are going to come out great.
The razor blade is for scale. For the most part, the adhesive on the four sides isn't really visible, but if you look close enough, you can see the texture on some of the MDF, of the linen backer that's attached to the Tolex. It can be felt with the hand as a very slight texture. It did seem to harden after a couple days and will sand off as described.
BUT, with what was under the single back panel, the adhesive is a different type. That adhesive looks like a black cobwebs and it hasn't hardened after stripping the Tolex.
When trying the orbital sander, this adhesive almost immediately clogs the sandpaper, if you can get it to do anything. It won't scrape with a razor blade. I haven't tried it yet, but on my previous MDF adhesive removal, I used a hand plane and scraped the top off then sanded it flat and smooth. This stuff still has some gooiness to it, so I'm not so sure I can get the plane to work on this.
I was hesitant to use any liquid solvents, as how it may effect the MDF substrate, but using acetone on a blue paper towel, it appears to get it to roll off in little pills. I will need to be sure not to get the MDF too saturated, as I'm not sure what effect it will have on the resins holding the fibers together in the MDF.
I've been doing this testing inside (sanding in the garage and the acetone in my work room) due to the weather outside today. When the weather improves (cold, light drizzle), I'll get outside and strip the whole back with the acetone, then sand everything to 80 grit. After that, I can then fill any indents and gaps, sand them out, finish sand the cab, then get to the application of the new Tolex.
To be continued.