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 Post subject: sanding plaster
PostPosted: Tue May 15, 2018 5:40 pm 
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hi, could you please advise what grit sand paper to use between mist coats and do you sand second mist coat before top coating ? many thanks


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 Post subject: Re: sanding plaster
PostPosted: Tue May 15, 2018 6:25 pm 
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No need to sand after mist coating... unless you've done it wrong. :shock:

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 Post subject: Re: sanding plaster
PostPosted: Thu May 17, 2018 3:45 pm 
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If you have to and, as wine~o says, shouldn't need to unless you've painted over a problem - maximum 120 grit (preferably 240) and even then you want to be gentle and re-mist any bald patches

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 Post subject: Re: sanding plaster
PostPosted: Thu May 17, 2018 7:28 pm 
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Sorry to disagree guys but you should sand your mist coat.

Mist coat - fill - sand has always been the way to go in the decorating game, whether it be with a pole sander, sanding pads or the newer dustless sanders.

I generally sand or at least denib between every coat.

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 Post subject: Re: sanding plaster
PostPosted: Thu May 17, 2018 7:53 pm 
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Ahhh I always sand, fill, then mist coat. I've been getting it wrong then :help:

BTW I assumed (perhaps stupidly) that this was new plaster...

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 Post subject: Re: sanding plaster
PostPosted: Thu May 17, 2018 8:11 pm 
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wine~o wrote:
Ahhh I always sand, fill, then mist coat. I've been getting it wrong then :help:

BTW I assumed (perhaps stupidly) that this was new plaster...
Yeah, mist coat on new plaster. I sand it to completely remove any orange peel effect from the rolled mist coat and to sort out all the filling that's been done. Leaves a far flatter finish once done.



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 Post subject: Re: sanding plaster
PostPosted: Thu May 17, 2018 9:59 pm 
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With Fitzy on this, always sand between coats of emulsion, mist coat included, and never ever sand bare plaster.



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 Post subject: Re: sanding plaster
PostPosted: Fri May 18, 2018 8:12 am 
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I do a quick sand (feel with my hand for any obvious bits that need sanding) before a mist coat knowing that I will do a more thorough fill and sand after the mist coat as I find the mist coat helps to show up any bits that I might otherwise not see.



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 Post subject: Re: sanding plaster
PostPosted: Sun May 27, 2018 7:28 am 
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many thanks guys will sand de-nib between coats then.


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 Post subject: Re: sanding plaster
PostPosted: Mon May 28, 2018 9:46 am 
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I've had situations where I've had to scrape of a wall because paint has failed over time (adhesion wise) (not mine) and it's cuffed it up a bit so I've always sanded the bare plaster flat. Never had an issue and it's years later.

Plus1 for Fitzys method.


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 Post subject: Re: sanding plaster
PostPosted: Tue May 29, 2018 9:50 pm 
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I ........

Scrape the wall over with a broad knife

Mist coat

Check for filling and fill with easi fil or simlar

Rub down the whole wall

Then 2nd/3rd coat

I dont fill or rub down bare plaster because it will scratch the surface, you can also see more dents etc after the mist coat

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