I have. Found the stuff we used did self-level, so long as you put enough down. I only needed a couple of mm, but found I got a much better finish once the thickness got closer to a cm - think it was just the mass overcoming the surface tension. Below this it took some care to get a smooth outcome. Found plastering trowels useful, the spikey rakes not so much.
Not an expert, but it came out ok. Oh, and very much a task to do with someone. One person mixes, one pours and levels.
I have. Found the stuff we used did self-level, so long as you put enough down. I only needed a couple of mm, but found I got a much better finish once the thickness got closer to a cm - think it was just the mass overcoming the surface tension. Below this it took some care to get a smooth outcome. Found plastering trowels useful, the spikey rakes not so much.
Not an expert, but it came out ok. Oh, and very much a task to do with someone. One person mixes, one pours and levels.