Great for fixing items around the house. Anything that is plastic or could be replaced with plastic can usually be printed. Also great for hardware and jigs. I’ve had mine for a bit over a month now and have been constantly running it. Check out printables or thingiverse to get an idea of what people are printing. Both are websites people upload models to.
Oh dang, I misread another comment you made. With regular stain the longer you leave on usually the darker it just makes it appear. But as long as you fully wiped off the excess after it should have worked out. That said I’ve only used stain on actual wood. Haven’t tried printing wood PLA yet.