This time things went much better.
So having failed dismally at putting a woodstain on the guitar, I started thinking about what else I could do to make it work. I considered painting it by hand with brown paint to kind of give a faux woodstain finish, but decided against it, as I felt it would kind of be a lie.
To decide on a colour, I started doing some research, looking at various guitars on multiple websites. I wanted something different, a colour that is rare to see on guitars. After many hours, I eventually came across a Reverend Bayonet, in Satin Army Green. I decided that was it. That was the colour I wanted on the guitar.
So I sanded it down, and we started again:
Either way, it was alright in the end, as when I sanded it I managed to get a smooth consistent finish just like the front of the body!
Next part: finalising the refinish process of the body!