Richard, i wouldn't question the quality of your professionalism at all mate, especially as your posts are mostly informative and helpful.
From my own experience of plastering, i find it fairly easy-ish to do a pretty good job, but very hard to do a near perfect job, which i guess is where you guys come in, if one wants to avoid excessive sanding and filling etc.
However, as good as my plasterer was, by the time i'd done my bit and painted everything, there was little difference in the end result. You couldn't really tell who'd done what.
I will admit that there was no way i was gonna tackle a ceiling of that size (24sqm). I wouldn't have known where to begin. But when i watched him do the kitchen ceiling (14sqm) it gave me more confidence to try a ceiling next time round. Thats why we paid someone to do it, and the fact that he had the tressles etc, i didn't.
I managed to skim all my kitchen walls in 4 hours, to the plasterers amazement, but i thought that was slow. It could have been finished better tbh, but that wasn't really down to time, it was down to me using a dodgier technique that what i learned the following day when i watched the guy work.
I'd have no problem letting you critique my work, indeed i'd appreciate the feedback, but its all been painted now and you'd never see it in decent enough detail to comment i'm afraid (pheww!
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But as a perfectionist (ask the mrs) i have to say, i'm happy with the result.
Oh, as regards the lessons, they weren't really. I just observerd and asked questions. I now no longer use a spot board. I've gone back to scooping out of the bucket straight onto the hawk, which i do find (as i've learned) that it keeps the gear for longer and there's less mess.