Carpenter's Wood Filler.

As a note: I would have Carpenter's Wood Filler be t' primary definition entry for these, me hearties, and refer FnF and Fill and Finish back t' it.  FnF is nay a term that t' Elmer's product uses, me bucko, and in fact thar are different products called Fill 'n' Finish although many folks still seem t' use t' term t' refer t' CWF.

CWF seems t' be t' more correct term right now.