Agree with Baldea, I try and keep home pages as the overview for an entire company or subject, then lets say internal products will be optimised for the actual product listed, so they rank individually for that search term and are displayed on a plate in front of the viewer. try and keep the visitors navigation down to a minimum, thus more chance of conversion.

If your home is the only one ranking for the chosen keywords, it could look like stuffing, Google scoring less for said product/service and visitor is most likely looking for an actual product/service rather than an overview which ends in a high bounce rate.

All internal pages would have the chosen product keyword(s), keywords hold first word presence in the title.

for example I would most likely use "Antifouling Paint, fight the barnacles with Teamac Antifouling paint"

hope this helps

Dave