Chipped away irregularities and built up with some mortar in a vent so that a proper inner part with a filter could be inserted. Had to build it in 2 stages (2 days) since it needed to set a bit before applying the top layer. Have watered around 2-3 times over 2 days now. How much longer should I water before I can attach the inner part and wait a few weeks to paint?
It is Finja Puts- & murbruk C 25kg. Yes, I have watered it a couple of times every day. The first part was done on Tuesday, and the last addition to fill the entire hole was done on Wednesday. It feels very stable at this point and I can't see any cracks.
So then I'll press on the inner part tonight and let it go for a week before I paint it.