Repair wall in the kitchen

[Vanagon]

Hello!

I'm tearing apart my old kitchen from the fifties and spotted this wall behind the pantry. Do you have any tips on what material I can use to fix the wall to make it smooth? I plan to have a refrigerator by this wall.

 

[Stefan N]

Rendering mortar, gypsum plaster works.

 

[anders07]

Use gypsum plaster!
Easy to work with and you can apply layers up to 6 cm at once.
Do not apply too thick a layer directly; instead, fill any holes and make it reasonably even first, then apply an even layer.
Gypsum plaster is extremely difficult to sand, so better to use a bit less and then use regular hand putty to make it smooth and neat. If it’s an uninsulated exterior wall, it might be a good idea to use silicate paint...

 

[Vanagon]

Thanks for the tips guys.