This should only be attempted by a qualified piano technician. They know first hand about most pianos and their construction and will be able to better advise you on what needs to be done to effect that change.
I really do not think it can be done. At one time, piano keys were made from ivory. If the ivory began changing, you could do things to it to keep it white. Today's piano keys are made of plastic. There is nothing you can do with yellowed plastic piano keys. Throw them away and replace them with new, white, plastic piano keys.
musicnotes.com you'll only get the sample though
Nina the soul siren
Replacing a set neck is difficult and expensive. You would have to determine whether the neck absolutely needs to be replaced. It should be done by a professional and you would need to compare the cost of the repair with the cost of replacing the guitar.
Its Jet.... look what you've done
Order replace done
Needs to be done by a good gunsmith.
First, one must secure use of a piano. Then one needs to take lessons to learn to play the piano, and must practice, practice, and practice. When done practicing, they need to practice more.
I really do not think it can be done. At one time, piano keys were made from ivory. If the ivory began changing, you could do things to it to keep it white. Today's piano keys are made of plastic. There is nothing you can do with yellowed plastic piano keys. Throw them away and replace them with new, white, plastic piano keys.
Rotors out of round - resurface or replace
Replace the coolant thermostat. It is probably stuck in the open position.
Replace the bent valves and inspect the pistons & head for damage. Replace and repair as necessary any defective parts.
Decent job -everything done which needs doing -about £430.
It may be necessary to remove the vitreous in order to replace the retina and restore vision.
You can replace your electric fuel pump glass by taking it into the repair shop and getting a good quote on what work needs to be done on it and the price.
For work to be done the piano has to be moved. As W = F x d and if distance (d) is zero then F x d = 0 Thus if piano doesn't move NO WORK WAS DONE.
You would need to take off the door panel in order to remove it. I've included an auto repair video in "related links" down below that will show you exactly what needs to be done to replace it on your 2000 Volkswagen Passat. Hope this helps you out.