Using protective gloves stain tissue box and let dry over night.
Using a foam craft paint roller paint your box and let dry over night. I generally only paint one coat maybe two.
Look over your decoupage paper you've selected and make a rough plan for how you want your tissue box to look. I often use tissue paper and napkins that have multiple designs and I make sure each side of my tissue box will have the look I want.
Place your paper over one side of the tissue box and gently press around the edges to create crease.
Cut about ½-1 inch outside of your crease lines to give you lots of room to play with. Lay your cut out piece of paper onto the side of your tissue box to make sure it fits and looks how you want it to.
Using a craft bristle brush or foam brush paint on a generous amount of Mod Podge to the side of your tissue box you are working on.
Immediately place your cut out paper onto the glue. Carefully press down and smooth out best you can. ***Do not stress this step. Do the best you can. Once the paper is on the glue you will not be able to move it around much. If you try to move it you will most likely rip your paper and make it worse. The good news is that even if it's slightly crooked or not perfect, it always turns out imperfectly beautiful so you really can't mess it up ;)***
Using your brush paint another layer of Mod Podge on top of your paper. It will look very white like you just dumped an entire bottle of Elmer's glue on it. Once it drys it will look clear. Let dry completely.
Add another coat of Mod Podge and let dry. I usually only do two coats but feel it and inspect it once two coats have dried. If you think it needs another coat go for it.
To remove the excess paper use sand paper and lightly sand the edges until the paper tears off easily. Repeat on all sides to remove all excess paper. Sand down any rough edges to make smooth.
Repeat steps 4-10 until all sides of your tissue box have been decoupaged.
If you would like lightly sand edges one last time to give it a beautiful rustic look.
Set overtop of a cube box of facial tissues and enjoy your brand new tissue box cover.