Help needed New Wall

Working in an old house, where a bathroom is being transfered to the room next door! The current wall backing on to the bathroom was sin quite bad shape, so the joiner that was working at the house has boarded up and skimmed a new wall (multi tasking obviously). He's done quite a tidy and straight job. However, the finish is a dead shiny slippy finish (Is that PVA?) Im a bit concerned about tiling on it (300x300), will it be ok once its primed?
Any ideas guys?

Skimmed you say possible pva and 300x300 tiles best to sand it back skimmed wont carry much weight

It could be skimmed Jay, im no expert! Its quite a big wall aswel! i'll get the sand paper out then haha! The joiner has left a bag of plaster mix and a bucket of something that looks like milk!! So it must be
Its quite solid like, had a hell of a job trying to get a baton screwed on! Back there Tuesday, so it gives me something to look forwad to!

Sounds like it make sure you get a good solid surface the pva will take some sanding but best to remove ,is there a shower to tile

No shower, just bath and thats on opposite wall!

you should be right then no need for waterproofing

pic

Make sure the skim has dried enough too Ben.

its shiny and slippy if that makes sense, thats not a very good picture as it was a before pic, but if you look on the left wall

Does it darken when you put water on it? If not - something's been put on.
Milky cack in the bucket - probably PVA.
Sand it all off and prime properly with an acrylic.

I went to prime it and it did discolour slightly! I'll get it sanded and primed again!
What a pain, there goes some useful time! I may have to go back to do the floor depending on customers choice but thats completely out on one side of the room! So i may be charging more money nxt time

It could just be that he has polished the plaster. That happens a lot round here, customers seem to think its a better job if it is smooth and shiny so all the plasterers do a final polish.
No one seems to render anymore. I'd use bal's quickset render over plaster any day.

Yep truth be told Ben you should be waiting 4 weeks for that skim to dry before tiling. If it's a solid wall I always use quickset render can tile after 4 hrs 24 hrs to waterproof good stuff. Also if the plaster is shiny you should rub it down for a better key.