No, chalkboards are a porous material.
Yes, we generally consider stainless steel to be a nonporous surface.
If finished properly chalkboard paint would work just as a regular chalkboard would. Depending on the wall type you may need to sand the paint after every layer dries to create a smooth chalkboard-like surface on a wall.
the disadvantges are they are very expensive and the surface of the whiteboard can easily be stained
Surface tension of water draws it into a larger drop. It will do that on any nonporous surface- metal, glass, smooth plastic, etc.
what are the characteristics of a chalkboard
The chalkboard was ivented in 1820
The plural form of chalkboard is chalkboards.
Leather is porous unless the surface has been waterproofed. Dubbin is one product that is frequently used to waterproof walker's boots.
It is correct to say "the chalkboard is moving" as the present tense is used for ongoing actions happening now. "Is move" is not correct in this context.
Chalkboard - typeface - was created in 2003.
Yes, chalkboard is a compound word.
if you want to have a chalkboard wall, then go to the paint store and ask for some chalkboard paint. apply 6 or 7 coats. I have a chalkboard wall and everyone loves it.