Take some rubbing alcohol and wipe down the mug you want to use for your monogram project.
Once the coffee mugs are dry, take your stencil and attach it to the mug with some painter's tape. Make sure you press firmly on all sides so that the stencil won’t move during this process.
Once you choose the color of your DecoArt Glass Paint Marker, press down on the tip on cardboard or scrap paper until the paint is flowing through the marker.
Then, start making small “X” marks inside the stencil until the entire monogram is full.
Take off the stencil and carefully fill any additional areas in with "X" mark.
After you finish painting the letter pattern, place the mug in a cold oven and preheat it to 350°F (176°C). Then, bake for 20 minutes to set the paint.
After that, switch off the oven but let your mug remain inside until it cools to room temperature. This will help prevent your mug from cracking during the cooling process.