I haven’t damaged my Cool Plate sheet enough to warrant changing it, but I did manage to damage the engineering side (3D LAC + ASA = BAD TIME!!!). Replacement Cool plate is on the way, but I was thinking whether just removing the sheet would yield the same surface as the other side, or if the texture/properties are different? This way I’d have one pure dual sided engineering plate.
Dual PEI plate also on the way (restocked today!), but having a smooth plate would be nice.
Also do not, I repeat, do NOT use 3D LAC adhesive on the Engineering plate - I tried it twice. First time I thought I put too little as the ASA was hard to remove but I managed. Second time I gave it two good coats and the ASA just didn’t give at all. I had to scrape it off, made a few dents and there’s still some ASA left in the crevices. Even put the plate in the freezer but it just welded. I don’t know why 3D LAC didn’t work as a coat there. I tried it once on the Cool side and there it had an opposite problem - PLA parts were flying off the bed like nothing. It’s weird because some people apparently use it with success ¯_(ಠ_ಠ)_/¯
I also found the need for a fresh Engineering plate before the cool sheet was worn as much. Here’s what I did. I still had two PLA cool sheets from the original packaging. I peeled the existing sheet off, and cleared away all remaining traces of adhesive. I sanded the rough spots on the side I had been using as the Engineering plate until it felt reasonably smooth, then I installed one of the cool sheets on that side. That gave me the two original surfaces I had, except that the orientation is now opposite what it was. Seems almost like having a new plate now.
I guess you could print a mirror of the Film Sticking Fixture (the included printable object) to make it simpler to install a new cool sheet with reverse orientation, but I just aligned the two pieces so that the cool sheet fit over the alignment holes, but the plate just used the recessed outline (the holes being at the other side of the leading edge). I removed most of the backing for the new cool sheet toward the leading edge, but left enough backing to cover an area of the adhesive side large enough to prevent it from sticking to the Fixture, and installed normally. After installation, I removed the small amount of backing which remained at the leading edge, then cut away the exposed adhesive area of the cool sheet.