Actually, Angela, it does depend on individual body chemistry to a fair degree, but I've only know one person with an acidic enough chemistry to have a negative effect. Sirry, kiddo, but no before-after pics. The changes can really be subtle. For example, my youngest son turned a pen for me about 8 years ago (spalted Pecan). Pecan isn't as oily as the other oily woods, but it's more oily than Walnut. His school only used a carnuba stick for finish. I have no idea when the wax wore off and my body oils took over. The pen looks almost exactly the same today as it did when he gave it to me. The wax/body oil only finish can also look quite nice on dense woods like Cherry, etc. However, I've seen one that I'd like to take back and refinish. It looks horrible (to me), but the customer loves it and is thrilled. Two guys ordered pens from the same Cherry and both wanted only a light wax finish because they didn't want to mask the natural look of the Cherry in any way. Both are daily users and one has turned nicely and reddened up like Cherry will. The other has actually greyed somewhat and doesn't look like I even sanded it. Apparently his hands sweat quite a bit and this played havoc on the grain. I've begged him to let me refinish (or even return) the pen, but he won't hear of it.