paint prices

friends I bought unlined unpainted 307 rc spoiler do you think how much is the painting prices in navy blue

I asked 206 spoilers, we said we will paint it to 150 of course.

The piece of paint varies between 100-150 TL, maybe they can spoiler and make the price better because it is an idle piece.

My friends have scratches all around 307, I made a polish paste but the result was not what I wanted. Can I have your opinion about paint? Unfortunately, the person who drew the circumambulate car.