Any chance you could take some photos, close up on the wall if you can.
Then we can use it as a " dont do this " to people.
A great idea. Definitely one for a hall (or dining room?) of shame!
I have to say, I've seen some dodgy things posted in the plastering forum since I joined in 2008. But this one takes the biscuit!
Singhsta - if he's going to skim with multi, then he may be able to correct. I'd suggest you only let him do 1 small wall and you review the results.
Based on some of your pics, the easi-fill looks nowhere near smooth, so your plaster could end up the same way.