I have the foam tiles on my floor, I would have painted it as well but as most have mentioned if you don’t do it before you move in you never will.
I painted all the walls with masonry paint from screwfix with a masonry roller, took two coats for a solid finish.
I would better plan the bench and power arrangements, I have now installed a 4m bench but I need to add more power both above and below. It seems the garage is going to be slightly domesticated with a freezer and tumble dryer, and now will provide winter storage for the aircon unit too.
I would love an outdoor tap and sink/drain.
I would thoroughly recommend installing 600×600 LED panels 4300 colour tone they are amazing, I have 4 above my bench and will be replacing the rest of the LED batons with them too, no shadows and a nice easy on the eye light.
Defo board the loft if you have one, a hatch will suffice for storing christmas decs etc. that will cut down how much you have to heat should you need to.
Seals around the up and over, I have installed a motor on mine I got it for £15 on ebay, a faff to install by myself but love it as does the wife when she is popping in and out with washing etc.