When I rolled Total Boat Wet Edge paint on my boat, which is also a 1 part boat paint, I got better results by doing a light “tipping” pass with the roller than tipping it with a brush. This paint seems to behave the same way.
I always wear a mask when spraying, when applying by brush or roller in well ventilated areas it is not so essential particularly with single part paints. I don't have any experience with painting bisque clay. I would think it will be ok though even if porous if first sealed with an appropriate primer such as the epoxy or multi marine primers. I have videos on the application of these products as well.
