Russ do you mean cellulose to clean brushes of the Dr Colour chip?
As that could be the clue help Bitsy clean the mess up.
If we asitain the product is cellulose based then it shouldn't matter how long after Dr Chip dried, cellulose will always dissolve it.
However if it doesn't then I suspect it is 2 pack based.
Toluene should help to dissolve eventually. But again
be careful and only try it on a tiny test area first!
