Like salsa, great wheatpaste can be made using various recipes. (In other words, this ain't no chemistry formula.) The easiest way: skip the kitchen and buy it. Go to your local independent hardware story and purchase wallpaper adhesive, either in pre-mixed or powdered form. Mix the powdered stuff according to the directions.

Home recipes for wheatpaste call for varying combinations of wheat flour and water. It's sort of like making gravy. (Wheat flour is regular old flour made from wheat. Use white or whole grain.) Here's a typical recipe: Mix one part wheat flour (e.g., 4 cups) with three parts water (e.g., 12 cups). Cook over medium heat until boiling, stirring constantly to remove all lumps. Lower heat and simmer for about a half hour. I never stop stirring. You will probably have to add water as it's cooking to get a substance that's smooth enough to use like paint but thick enough to stick to walls. Do not burn. Let cool before using.

How to Apply Your Posters with your Wheatpaste

- Obtain a bucket for the wheatpaste, and a wide brush-like a wallpaper brush, sponge, or paint roller. See what works best for you.

- Brush a thin layer of wheatpaste on the flat surface where the poster will be pasted. Slap on the poster. Smooth it out. Some people brush a thin layer of wheatpaste over the poster as a topcoat, but you should at least cover the edges and corners of your poster with wheatpaste so it can't be peeled off as easily. (Most wheatpaste is fairly clear when it dries.)

- Make sure all corners of your poster are pasted down, and minimize bubbles or wrinkles. The posters are more difficult to remove this way.

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