If you sand through the polyurethane and remove some stain, you can touch up with more stain. But the repair won’t be perfect, so take pains to avoid that mistake. Sand very lightly after the first coat, just enough to remove the dust whiskers. After the second coat, you can sand a little harder to flatten larger flaws. Always be careful around the edges of the table; that’s where it’s easiest to sand through.

Woodworking power tools include various saws for cutting the wood to size and drills for creating holes. Sand pieces down to the finish you want before you sand with portable sanders. Use drivers to install woodworking fasteners for a durable final piece. Cleverly designed rotary tools feature removable bits that can drill, drive, sand, cut and more, so you can use a single tool to accomplish virtually every task of your project. For a production-level project, nail guns can save you hours or even days depending on the work involved.

Thermal imaging systems work great at finding water leaks, electrical hot spots, and insulation gaps in walls. But until recently, thermal imaging systems were not a practical tool for the average contractor because they cost thousands of dollars and were the size of a microwave oven. But now this extremely helpful technology is accessible. FLIR’s new C2 compact imager is pocket-size but has most of the same important features as larger models. The touch screen controls are intuitive to use, and it acts as a regular camera as well, which helps when pointing out to homeowners or coworkers where exactly the trouble spots are. They also make models that work with your smartphone.

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