I always liked the Europa, quite a unique crar, a friends sister had one. My lasting memory of the Europa from childhood was seeing the remains of one that hit a Jaguar head on and burst into flames at the top of our road. Bits everywhere, one of the doors was quite a way up the reservoir...
I have a 6ltr cleaner and did a set of Mikuni flat slides one by one in it with floor cleaner. Works well hot, I just don't leave alloy in it for any length of time as it starts to go dark grey so possibly has a small amount of caustic in.
I made an adjustable dolly to move a car about here if it is any inspiration.
Thread 'Autovip 1400 & 1700 Car Tilter Chassis Dolly' https://www.mig-welding.co.uk/forum/threads/autovip-1400-1700-car-tilter-chassis-dolly.39694/