Pigments, Resins, Solvents and Additives
The ingredient in glossy paint is acrylic. You cannot remove that ingredient.
pigment
Yes, you can.
PU stands for Polyurethane, a kind of plastic that's the main ingredient in the paint.
Absolutely not and you should use the same manufacturer of the paint you have on there also. Sorry you can only use a chlorinated rubber base paint on a rubber base paint. If you try to paint with the chlorinated rubber base on top of a synthetic rubber base paint it will probably peel like a bad sunburn.
What they call "oil base paint" is really called "alkyd base paint." So yes, you can do that.
Yes, you can
If the base coat used in your project is water base then yes, you bet you can. If there is any chance that the base coat used was an oil base paint then you cannot paint directly over it. The acrylic enamel will not adhere to the oil base paint and will begin to peel off as soon as it is dry. In which case a coat of primer is in order.
Black paint actually covers better than white even though it lacks in titanium dioxide, the main ingredient in white paint.
Yes, you can. You can always paint over with same paint.
Paint is a base.
Yes, as long as you have the same base that's not a problem.