I think you will find that the green coloration will go beyond being just a surface stain. If you remove the finish with a stripper it may take most of the green out, but much of that depends on the density of the wood and how deep the dreaded green penetrated the wood. Luckily a good spirit based stain in a medium to dark shade will usually completely cover it. This might be a good gun to try the Rustoleum patina on, since the green is most noticeable on end grain which is usually around lock moldings, and cheekpieces.
Hungry Horse