bottom finish on Go 171

hi ive just bought a 'wherehouse soiled but new Go 171, the shop said that it had a small crack in the paint on the bottom, and they had repaired it, i received the board today, the whole bottom of the board except around the starboard sticker by bow, is covered in a kind of fine dust which i wiped off with my hand, the bottom isnt shiny or smooth, its allmost like a sand paper finish like plaster dry plaster with no finish or shine, is this correct?
Also he sent all black footstraps, no white at all, and i can only mount two as the screws dont seem long enough to go into the non twist thing, and the board!
could you please give advice?
i feel ive wasted my money.
Glen cross