Because it's a load of fun . . . and with certain burl caps, a good deal of the work is already done for you! And let's face it, who isn't fascinated by the natural exterior of a spiked or gummy burl cap. Some of the burls available to me to purchase may have significant visible ant or termite damage. None more so than a pair of Vasticola Burl pieces I purchased not long after I began importing in 2004. Naturally, there are other options for putting more modestly ant/termite damaged burls to good use, but I'd venture to say, none quite as fun - or messy - as the creatively destructive process of power carving. Below is another example of an ant/termite damaged burl that has the qualities I look for in pieces suitable for carving - a nice shape, likely heartwood/sapwood contrast, and a beautiful natural side. Since no one purchased this piece for more than two years, I'll use it to create a more substantive tutorial.
As shown in the slideshow at the top of the page I use an Arbortec mini setup for smaller pieces and a 4" angle grinder fitted with Arbortec Pro and Kutzall carving blades for larger burls. Naturally, there are other tools and blades available. Be sure to wear appropriate safety equipment when power carving, including a long sleeve shirt . . . unless you're keen on being pelted by little pieces of wood at high speed. And I strongly recommend you power carve outdoors if you're able. I doubt there's a dust collection system around that can handle the chips/dust.
Hard to believe this burl did not sell as it was for years. But it gives me an opportunity to create a (hopefully) helpful tutorial, better appreciation for insect damaged burls, and ability for those lacking experience with them to look below the surface and see the inner beauty just waiting to be released and showcased . . . I rough carved this 11/16 and will add more images to the slideshow below as I work to finish it.