finishing_coat
1. [ noun ] (color) the final coat of paint
Synonyms: finish_coat
Related terms: coat_of_paint
2. [ noun ] the final coating of plaster applied to walls and ceilings
Synonyms: finish_coat
Examples:

"we can't paint until they put on the finishing coat"

Related terms: plaster coating
Similar spelling:   finishing_touch
  finishing_line
  finishing_school