Spread on a thin layer of drywall compound, let dry and then do more thin layers as needed until the wall is even. Let dry, sand, prime and paint. A messy job but worth it in the finished product.
Hi Lynn, is it drywall, paneling etc? This would help to give you a good answer. Thanks
Hi again Lynn, I am not sure what to tell you because I do not know what you have access to in South Africa. When I read about rinolite it sounds like a form of plaster. Here is a video on how to fill low spots on drywall which will be what you will do with the rinolite.
How is it uneven? Just spreading plaster on the wall will only make it look worse if you don't know what you're doing. A drywall company would be able to help.
Thank you for your advice