Dwarf refers to a person with one of several varieties of a specific genetic condition called dwarfism. A dwarf has disproportion of body parts. This is generally caused by a genetic or nutritional disability. Any adult human below the height of 4'10 (147 cm) is considered a dwarf.
One Piece has a great story and does not have a lot of filler episodes.
The only other specialty material that is universally needed is body filler. You will need to use some body filler to smooth your fiberglass work even if you are going to cover the final product with vinyl, and the brunt of your work will be at this stage if you are trying to prep for paint.