undercoat
un-der-coat
verb
To apply a preparatory layer of paint to a surface before the final coat.
"You must undercoat the door."
noun
A dense, insulating layer of fur beneath an animal's coarser outer coat.
"Many dogs have a thick undercoat."
noun
A preparatory layer of paint applied to a surface before the final topcoat.
"Apply a white undercoat first."
Thesaurus
Synonyms: priming, primer coat, priming coat, primer, flat coat, ground, prime, underseal, underfur