Can you get Simple Green in the UK?
It's my latest favorite safe stripper, for acrylics, enamels, and automotive laquers. Failing that, CSC type cleaner is excellent for enamels. The enamel on my Z3 was thick and six years old when I stripped it in CSC- came clean in a day of soaking. Then of course there's isopropyl, but I understand it's hard to get in the UK....
So, what's the kit?