Oil and grease stains
- Some oil fell on the kitchen worktop. Now there is a dark stain and near to the cooking stove there are some dark marks.
- My car lost some oil drops on the natural stone pavement and now there are some black spots.
- An oil pipe of a working machine broke and stained the external flooring with oil.
- The maintenance man dismantled a pipe of the sanitary installation and while walking down the stairs the oil stained them.