Don’t be scared of this mate nothing hard about it ! I would render carrier board over steel ! Poly base over that filling out the edge !
Then use a good cement base coat to form the detail bull nose angle tool and rest with a straight edge
A mistake plastering easy fix no cost ! A mistake with render big cost
Plastering tools £1000 your setup rendering £10,000 your set up
Plastering weather has no effect rendering weather is everything ?
That’s the difference
Hi mate for me a miss is a un scratched area with totally different texture !
Your recent update photos show them pic 2 ,
The issue I see on your original photo is rubbing back to first coat and over rubbing
Hi mate my first point is it’s always best going back to substrate if you can
If you can’t it’s possible to go over with the correct products
I would avoid k rend and go Parex speak to them and they will send a rep to advise you and it’s a free service