I've built several guns with the same termite holes and staining , in them. I had a standing order for this type maple wood. I also prefered this wood because the price was usually less. I've seen original rifles with these anomolies , and to me , that gives me license to build rifles with the wood. I use alcohol stains , and can create any staining necessary to enhance , hide , grain patterns , and or figure. To make wood dark , apply black alcohol stain first. The bonus to this is , any figure , curl , etc. , is enhanced w/o unnecessary excess application of water . Dry immediately with a heat gun , and polish with OOOO steel wool. Dewiskering is also done with this step. As with any staining , testing of the color shades should be done on scrap wood before final shades of stain is applied. Back in the early 1970's , I tried most of the chemical agents recommended for use on wood , and found they were hard to control the reactions achieved on perfectly fine maple wood. Though I followed all the directions attempting to stop the unwanted stain results , I ended up with green stocks after time passed , and other chemical proceedures , that just turned black in time. Alcohol stains can easily be repaired if damaged , as well. That's why I use alcohol stains. I consulted several of the master gunstockers early in my experience , and alcohol was their choice for the same reasons I've stated. LOL , do as you wish.