Rio, I would only use Dyemore. I have seen where some used the regular stuff for plastics, but the Dyemore is designed for use on synthetics, plastics in particular.
I have not heard of anyone trying to dye the plastic (Thermoset) tables. They are made of a different material than most plastics, so it is hard to tell if it would work. It would be interesting to know however. If you try it, let us know.
Those thermoset tables will clean up to look like new. So if you are considering dying them to hide stains, you don't have to. I would probably do a batch for some knobs and try dipping the corner in the dye to see if the thermoset takes it. But you would have to hold it a long time. If you had a spare to try it on, that would be great.