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Unread 10-01-2007, 09:27 PM   #23
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Join Date: Oct 2007
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You can use drywall compound. You can buy it at your local hardware store for about $10 for 10lbs it comes premixed or in powder form. If you buy the premixed stuff you should still add some water to it, its pretty thick. You can buy the powdered stuff in 10lb bags, its usually call 90 or 45 which is how long it takes to dry. Note that it sets up pretty fast, working time of only about 10 minutes. It dries harder than the regular premixed compound and is harder to sand. You should seal the cardboard first, the water from the compound can make your cardboard soggy and deform it.
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