Thanks for the tip, wagondude, I will definitely do that. At this point, spackling is mostly done other than overlap edges and the occasional divot
My drywall technique is pretty decent after doing the interior of my entire house. First room was pretty pitiful (and could have used your advise back then) but the last came out pretty close to professional considering I am a computer nerd. Pretty difficult to see any edges there anyway.
Spackling for canvas is nowhere near as demanding as a smooth paint semi-gloss finish. Just finished sanding the canvas edge w/TB II standing proud and galley supports where I foamed the wrong vertical edge

Spent some time getting all the flashing flopping edges glued down, put in the last galley support frame member, caulked the edges of the entire galley support edges/cracks/divots/etc. prior to covering all with canvas tomorrow.
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