Drywall/mudding/painting is best when you keep it simple. Don't do it over old/dirty/dusty shit either, strip everything down, the prep work is key to success. Pro mudders just need a good couple of blades, stilts, couple buckets, a paddle mixer, tape holder, and a disc sander on a pole same as 40 years years ago. Don't fall for the extra shit & fancy shit, unless you actually doing fancy shit. 4 walls and a ceiling doesn't need that. Remember, the concept is so when the paint goes on the walls look smooth and unblemished, nothing more. Got a fucked up spot giving you trouble? put a hole in it and put a patch in with backing, don't waste time playing arts and crafts. Got a fucky section of old drywall? tear the whole fucking thing out and replace it, a sheet of drywall is like 14$
I fucking hate painting and mudding, my brain tells me it looks like shit, even though I know it will be fine after drying/sanding, I got that hyper attention to detail, wonderful for most work, and people hate me when it comes time to check for deficiencies. I actually used to love boarding, but how I fucked up my shoulder 10 years ago.
Never seen anyone roll mud in my entire life, pro mudders I work with mud and tape so fucking fast, adding rolling to the process would slow it down. I don't know where the concept came from that you need to skim an entire wall, that's what primer is for FFS. I see people doing this a lot these days. If it worked like that, we'd just use an airless and spray the whole fucking wall down.
Rent a drywall lift for DIY, makes your life so much easier, priceless for ceilings, I don't mean the mini scissor lifts, I mean these:
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Like 30$ for a day from Home Depot IIRC, makes everything so much easier and faster if you solo. I used to board entire houses solo in a day with one of those things.
Please fucking wear a mask, pretty much only time I'll ever say it lol