Hi guys, I've made a bit of progress already with this cab restore; been working on this as well as my KISS pf, (working on this while paint, and/or inserts glue is drying on the Kiss pf).

Started stripping the paint off the backbox yesterday, doing the backbox first just because it was easier to start on it and get some progress happening
I ended up just sanding the paint off with 80 grit sandpaper, 1st pic shows where i have sanded half the paint off of the side of the backbox that had the planking in the plywood.

Initially, after discussing it with Martin, the games' owner, i wasnt going to replace the BG surround woodwork, after a bit more inspection, i decided that the side pieces of MDF would have to be replaced, as the edges were really rounded and shitty looking, so rather than try filling with bog, i decided replacing them was the go  
So off to Bunnings i went for some 16mm MDF to make the new side pieces from, as well as more sandpaper, filler and a couple of cans of Dulux white undercoat spraypaint.

2nd pic shows the new side pieces being glued and nailed on, the right side was done first, glue allowed to dry then the left side done. the top piece was ok so it was left alone. This was all done yesterday.