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We also now include a special 2 foam roller handle with pad and mini-tray for easier application to vertical and larger surfaces. How long will it take me to do? It takes about 45 minutes to prep a standard tub, and maybe an hour to properly apply the first coat. Then 4-5 hours of drying time and then a second coat.
Spray the mixture in your tub and shower and wait a few minutes before wiping clean. You can also try removing hard water stains with a paste made from baking soda and vinegar. Smear the paste over the surface of the stain and let sit for 15 minutes.