Trim the other half of the miter using the same technique. Use the same shim and place it the same distance from the blade. Drop the blade slowly through the wood to shave thin slices ...

Are you thinking about upgrading the trim in ... in your home shop, you'll need a few broad planks, such as 1x6s or 1x8s, and some narrow ones, like 1x2s or 1x3s. Paint-grade wood, like poplar ...