I will be using this on my walls too but I used it on the bricks on my hearth first. I used milk paint on the bricks and used this to seal. I wasn't quite expecting the lush look it's created. I'm insanely happy.
I love Savon de Marseille for its ease to work with with just the right sheen. I think it will be a toss-up between this and Spatula wax which one will be my go-to.
Very nice sealer, barely seems to change the color of Venetian plaster at all. Nice luster, easy to polish.
I'm a homeowner and applied Venetian Plaster myself. The soapstone wax (FirmoLux Savon de Marseille soap) gave my Venetian Plaster a beautiful glow. It was so easy to apply and only needed to be very lightly buffed. Very happy with this product and will use it going forward.
Savon de Marseille (Soapstone wax)