This is a 3D print of resin, which can be normally machined (sanded, drilled), glued with instant glue and painted with common model paints (before painting, I recommend spraying with a primer).
Before removing supports, drilling or cutting, I RECOMMEND soaking the accessories in hot water or heating them with a hair dryer. Resin softens slightly and DOES NOT CHIP. Without this heating, unwanted chipping can occur. After cooling, the resin regains its original hardness.
I will be happy to answer any questions.