Karl,
This stain is a water based stain, unless I'm mixed up. I'm finding that there is a learning curve to go along with every new type of product.
This stain sometimes requires heat to set the color. If you direct heat from a heat gun, you can see the colors darken. The stain reacts with sugars in the maple and the heat allows you to play with a range of color shades , from a yellow, then to brown, then to almost black.
Of course, you would want to apply it after all sanding is done and your ready for the finish or sealer, which is separate from this type of stain. I have had to touch up my sanding and restain the touch up areas and blend it, which works well. It's pretty forgiving right up to the time you seal it. Lin