It's always possible to darken a stained surface, but you cannot lighten a stained surface after the finish has dried.
When the surface is still wet, you can try to lighten the color by scrubbing with mineral spirits. If the finish has hardened, you will need to sand down your current stain and start over or use one of our paints.
You can mix GF Gel Stain colors to create a custom color.
You can also thin Gel Stain with 10-15% mineral spirits.
Always test our color on a hidden area of your project before beginning.