Flooring
Junckers have always had a good reputation for manufacturing some of the best lacquers and oils on the market. If you are floor sanding your wooden boards then always use a quality lacquer or oil as using cheap lacquers will only mean having to re-sand you floor at a much earlier date.
Having sports floors re-sanded should always be left to the professionals as you will require court marking after the floor has been sanded. Many professional floor sanders will offer this service and often you are best to get references before letting them loose on your floor.
French polishing requires a number of years experience and often many floor sanders can do this job too so if you require the services of a French polisher check with your floor sanding company to see if they can help.