November 28, 2011 5:06 AM Subscribe
DIYers: How anally retentive with joint compound do you need to be to prevent visibility of seams after painting?
posted by Gordion Knott to home & garden (14 answers total)
I'm finishing sheetrock for a garage ceiling--a money-saving project that's also, well, a good indoors DIYer for the early winter. Running into a speed bump. Relevant details:
-The sheetrock crew taped and mudded the seams and screws, and also added a second skim coat. My job is to finish the mudding and paint the ceiling with a coat of primer and a coat of white topcoat.
-Using a 6" drywall knife, I added the third coat of mud, but because of my inadequate feathering skills, many 1/16" and 1/8" ridges and divots remained. Sanded, spot-coated with mud, sanded again. Now, only a few 1/16" or 1/32" bumps and thin knife-creases remain, but some of the seams are visible when viewed under direct light from certain angles.
My question is this: After a coat of primer and topcoat, is there any chance that these 1/16"-or-less flaws will be visible? Will two coats be enough to cover them up?
I realize that I've got more leeway in aesthetic flaws than I would with a wall, because it's a 9' garage ceiling. But I want to be satisfied with the final results. Also, I know that I could test my work by priming and topcoating a small section, but I want to see what your opinions are before jumping into this stage.