Dont know about the new Isonics but I have a Mistral red dot Syncro with little or see through paint.Its hardest board I`ve ever had to match paint with after small ding repairs.Its impossible to match to !!!
Spray over the repair and you end up with a white patch;rub it down to emulate original finish and you can see the repair !!!
But its also lightest board I`ve ever had ;so its a small price to pay.
Would be interesting to spray board completely and see how much weight it gains !!! Not much I`d guess ???