Varnishing a wooden wheel?

[Black_Inky_Eyes]

So from gathered info and helpful replies from my last thread. Thanks, everyone I've decided to get a 33cm wooden Trixie wheel, 1) how quiet is this?

But to the main part since this wheel is made of wood I'll be using Plastikote White Enamel 59ml to waterproof the wheel and protect it from hamster urine. However, I have a few questions:

2) Since I'm varnishing the entire wheel, the stand, the wheel and the attatchments will this alter the quietness of the wheel?

3) How many pots of Plastikote will be enough to cover the wheel? Is one layer enough?

4) How long do I have to wait before giving it to my hamster?

5) Do I need to add grips for the hamster?

6) Any other opinions on this wheel?