Has anyone used this type of product https://goodsbeast.co.uk/products/d...MIn4mM9uKL7QIVuBoGAB1StgqHEAQYAiABEgKUpvD_BwE & knows that it really works as well as they make out. I find it hard to understand or believe how they can do what they claim if the paint has gone down to the primer, especially with water based paint & lacquer.