I repaired some channels in a wall with one coat plaster yesterday but some of it needs another couple of mm on to get rid of a slight depression. Do I wait for the first lot to dry or can I just add a little more on top of the damp first layer?
No you can do it while it is damp - in fact it will be easier.
Shove it on damp is better.
Then sand it all flat afterwards ;-)
That's the correct answer (ie, the one I wanted)! Thanks.
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