After using a charcoal block as a soldering surface for a month or two, the surface tends to become a bit rough and crusty with flux. Here I've shown you an easy way to repair its surface, as well as a way to annoy your neighbors.
 | This is what the surfaces of my charcoal blocks look like after just a month or two. A few years ago, charcoal blocks were only about 3 or 4 bucks each. Now, you generally pay $8 or $9. Because they've gotten so expensive, you'd like to get as much use out of each. |
The first step to repairing your surface is to wait until it is after dark. My neighbors usually don't go to sleep until around 10:30 or 11:00. Once your least favorite neighbor is asleep, creep quietly over to their front sidewalk, and place the crusty block flat on the concrete surface of their porch. Using a circular motion, abrade the surface on the concrete until you have sanded off all of the old flux and rough areas of the charcoal. If it is a particularly obnoxious neighbor, try to make as big of a black mark as possible. |
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 | Flip the block over and do the other side. |
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While you are sanding away the surface, check periodically to see if you've done enough. The block will sand away very quickly. |  |
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Wow, much better. Not only is my soldering surface clean and smooth again, I've provided some mental therapy for myself involving my relationship with my neighbor! |
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