Did some cleaning (for a change) again and got the other half of the inside floor done. I felt on a bit of a roll, so did most of the dash before the last of the cleaning discs disintegrated. I switched back to the grinder brush for an hour or so and did some of the bits that were left.
I cleaned a lot of the gunk and glue from inside the boot and the edges of the roof that we’re covered by the headlining.

I know nobody will ever see it, but at least I know it’s done. By this point I’d had enough of using the grinder as it’s starting to vibrate sightly and makes your fingers numb after a while. The roof soundproofing was next, and I took the remains of it off with a wallpaper scraper, then went over the entire lot and scraped the tar residue off. You can’t clean this with power tools as the tar melts and just moves around. I’ll wipe as much of it off with thinners as I can then spray over the top of it. It’s lasted fifty years without paint on, so it should be fine. Brush painted the floor with red oxide, then next day quickly cleaned the dash with thinners and sprayed with some white primer. It was cheap stuff, and sprayed badly, but it gave me some idea of what it’ll look like done. I’m like an excited kid again!