Step 10Apply the pins to the toast
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Using four pins per piece, secure the edges first in a straight line using the drywall square. All of the pieces will have dried a little bit different, so make sure all of them fit in the middle correctly before securing the edges. About twenty pieces in, I discovered that a thimble would have been a good idea, but a piece of plastic worked as well. Even with the shortest pins I could find, about a third of the length ended up sticking up above the toast after it was secured all the way through the foam board. At a distance, these are too small to see at all, so just be careful not to poke yourself while moving it around. If your foam board is hanging off the edge of your working surface, make sure not to stab yourself on the underside of the board. My fingers ended up looking like a voodoo doll by the time I finished.