Well, if its oxidized you will need to get that handled first, but if its a new boat and wax is going to actually work I would charge about $6 a foot if it were me. I would use a sealant instead of wax if he has some Klasse HGSG or something.
I charged him $150 - Did it this morning. It took me 3 hours. I used Royal satin cleaner wax. It was his product.
The boat was in the corner of his shop. I couldnt wash it. I had to soap it down and wipe it off. The reason being there were machines all around the boat that I could not get wet.
The boat was up on blocks. It needed to be done today because the boat is leaving the shop tomorrow.
After seeing the boat, I should of charged him $6 a foot.