What is the use of wax to protect the paint?
The use of lacquer makes sense in the context of an oil-based lacquer. A paint like lacquer is a natural, inert, inert, inert substance. In an oil-based lacquer, the lacquer particles themselves are in a state of permanent contact with oil. This is because the oils are present, but due to the solvent-based properties of oils, they must be mixed with the paint mixture to provide them with a liquid form to bond to the glass. As the paints that you use to paint glass have an oily property in them, and are therefore more likely to corrode and absorb oil, they tend to have a rougher wear and tear appearance as they dry. When you start using a natural lacquer, the product you buy can actually help to make you a better painter, since the oil that is in your paint helps to reduce the rougher wear and tear that lacquer paint products can have. The same applies to any natural lacquer (oil-based, oil-based varnish, wax) that you use on your painting. These properties make a perfect match for water-based varnishes, and natural waxes. They give you a smoother, shinier coat of paint, and the use of these pigments makes you a much better painter, as they help you to get your image onto those glass surfaces that water-based varnishes cannot touch.
We don’t know much about this application; but we do know that most lacquers that you see in the store today are either oil-based, or varnishes; and that many water-based colors are oil-based. The best lacquers are natural, so the use of any kind of wax allows for a much better finish. This is also true for paints that come from oil sources, as those paints will have the same qualities for water based paints, since the color is the same.
The other benefit of wearing down a coat of lacquer with wax is to extend the life of a painting and help it last longer; by using more wax, you are giving yourself a longer window where you can do whatever you want to with the painting. Just like a water based paint, it tends to last even longer if you use less.
If you want to see this in action, here’s a video of me using some of my natural wax colors for some very simple coats of