Pour a small amount of latex paint into a large bucket. Add the glazing medium.
Start with a ratio of one part paint to four parts glazing medium. Add as much as 15 times the amount of glazing medium to the paint, depending on the effect you want. One gallon of glaze is sufficient to apply at least one coat of a faux finish to the walls of a medium-sized room.
Stir the glaze thoroughly to completely blend the medium with the paint. Test the paint on a sheet of scrap paper to see if it is the desired transparency. Add more glazing medium if necessary.
Mix enough glaze to complete your entire project. Matching the exact level of transparency in two different batches of glaze can be difficult to achieve.