In my opinion on Pigments:
There’s water based or oil based.
The PER pigment I gave Rezcar was oil based and I wonder what the epoxy pigment is based on?
But always, test panel any new materials before a major part.
ON scales:
Watch the max load of the scale as higher the max load, the more the + - factor. A 5000 g scale can have a + - of 2 / 3 grams and when you weigh a 100 grams, 2 or 3 grams can be alot!
But if you over load a scale…get the scale range that is what you are going to need.