Make a small investment by buying 1/8 hardboard cover your floor from wall to wall and seam tape. This will protect your floors from tools or materials that may be left on the surface, which can cause damage.
Care Tips for hardwood floors:
vacuum regularly to help reduce the accumulation of dirt.
Rags, paper, resin, plastic, is not sufficient.
This is good to prevent spills of paint, but always start and move, albeit at a low cost, will not protect actual damages, such as paint cans thrown a slanting ladder and tool boxes or containers.
A typical room of 200 square feet that will cost less than $ 50.00 to protect wood. Or contractor will cost more than that for them restored.