I printed a Drybrush Pallet to use for testing out paint schemes and other things for my WH minis before applying to the model, but when I started using it the paint is getting absorbed by the model itself, like the resin is porous.

I have primed the piece, it was cleaned properly, and cured correctly. Is there another step I am missing in the prep process?

EDIT: The resin I am using is below

ELEGOO 8K Resin, 405nm Rapid UV-Curing Photopolymer Standard 3D Printer Resin