This figure is printed in grey a custom blend of 8K and ABS like resin on an Elegoo 4 Ultra printer.  This gives it crisp details while allowing for some flexibility in the finer details.

The model components will mostly be printed solid while any large elements will be hollowed.  This means there will be two small holes in the piece that allow the liquid resin to drain out during the printing process.  These holes can be filled with epoxy putty or simply left as they are usually hidden in an inconspicuous area. 

The resin items I print are all carefully cleaned, washed, removed from supports and cured.  Sometimes, models have very delicate components.  In this case, I send two copies of the component- one cleaned and separated from the supports and one still attached to the supports.  This gives you a spare that can be easily removed from the supports by running it under hot water and carefully breaking the supports away a little at a time.