Hi all! Advice from tradies or experienced DIYers welcome. We have renovated and removed wood shelving around an old fireplace. That has left unfinished edges as you can see in the pic: https://cdn.geekzone.co.nz/imagessubs/eb68c2f8c5eb84573002313ee42ea877.jpg
I need to plaster/fill this but am not sure what product/technique to use.
The unfinished sides are quite deep, and in some places the plaster I add will be up to 25ml thick.
The area doesn’t get hot at all.
Any tips of what product to use/unique?
The areas aren’t that visible, so the finishe doesn’t need to be perfect. We are going to paint over it.
Cheers!