Use a kitchen pan scrubber and and Goof Off. It will soften up and come off easily without harming most upholstery. If you are unsure, test on a piece not normally visible first.
yes.
yes
. Acrylics ARE water based.
Generally, water based paint dries faster.
Yes. Clean and degloss the oil based paint, apply an oil based primer, then apply the water based paint.
Because paint thinner is also oil based and water is not.
Water based paint does very well on plywood. The finish depends on the type of paint.
Yes, you can, That's the normal way.
Yes. Clean and degloss the oil based paint, apply an oil based primer, then apply the water based paint.
Water based paint is often termed "latex based" and it is used for a vast amount of applications.
can i use water base paint over oil base paint
Oil based paint has a very hard surface which makes it difficult for water based paint to stick to properly. It should be primed first. Water based primer is fine. To make certain the water-based primer has good tooth, be sure to lightly sand the oil-based paint and wipe it down with a tack-cloth.