It should also be noted that not all waxes are equal. A high quality pure Caranuba Wax should have little to no water in it and should do little to no harm to even a shellac finish assuming a good application method. A low cost wax often has other substances in it to "cut" the wax and cut the cost and those will almost definitely do damage. All of the good waxes I've used have been thick and waxy feeling.