try pressure washing it off. . .this should lift off that kind of paint
or you can use acid wash for concrete
Sure, you can fingerpaint it with watercolors if you want to. Won't stick, though.
Concrete
pour more concrete over the top and smooth it out
you have to sand blast it off
You need to try and get the concrete off before it settles. You can try scraping it off with a razor blade.
You cannot do that.
The easiest way to get melted plastic off of concrete is using a heat gun. You can heat it and them absorb with a porous scrap cloth.
Clean this off with water and a cloth rag or a brush.
Use the moveobjects on cheat and click on your flowers and place it on the concrete
Start by scraping off everything you can with a spatula or similar tool. The stain and residue on the concrete may be permanent, but you could try concrete cleaners designed to get oil stains out.
No, the undereith will wear off
nail polish remover