The floor is coated with a BASF product called Master top 1080 it is a 3 part pack that makes 5 liters. It is applied with a brush or roller and is acid, oil and chemical resistant. It is not a paint.
I had my father help with the gutter and fascia,I had an electrician do the power and a friend help with the ceiling sheets, otherwise I did it all myself. I made the frames, stood the frames pitched the roof, clad the walls, insulated the walls roughed in the power. Fixed the roof sheets. Painted the walls floor and ceiling and also made the cupboards. It is 3mm out of plumb and 4mm out of square. I have enjoyed the task very much and are looking forward to actually using it.