Bowed door reveal

[Turkish]

Hi, Went to look at a job today, kitchen splashback and a couple of other bits. Part of it involves tiling into the right hand door reveal however this is quite badly "bowed". Ideally i need to flatten this out. It bows outwards in the middle so it looks like this "(" as you look at the door (somewhat exagerated). My idea is to knock out the lump and repair with either one coat or rapidset. Anyone else got any opinions on this?

Cheers

Turkish

 

[DHTiling]

sounds ok to me.. i would prefer the onecoat as it can go thicker on one go.......