So my partner and I are trying to resurface a concrete wall in an old house in Taiwan. Before I get into the nitty gritty of asking how, I just want to clarify my terminology first – I think I've got plaster and some other things confused.
This is what the room looked like after she and I finished scraping off all the loose material we could yesterday afternoon.
I used to think the top layer was plaster, but after watching some videos on YouTube, I'm beginning to think the plaster is the cracked, gray layer underneath, and the concrete is just below that. (I'm also hearing that ‘stucco’ is an alternative term for plaster, and that it's called ‘mud’ when wet?)
Is that right? If so, what is the (formerly white, powdery) layer on top?