undercoats
un-der-coats
noun
Preparatory layers of paint applied to a surface before the final topcoat.
"We need two undercoats for a smooth finish."
verb
Applies a preparatory layer of paint to a surface before the final coat.
"The decorator undercoats the skirting boards carefully."
Thesaurus
Synonyms: priming, primer coat, priming coat, primer, flat coat, ground, prime, underseal, underfur