shellac on the Harrison

Your article about the Harrison Harps says:
"if you get that uncomfortable porosity sensation against the tip of your tongue when you make contact with the mouthpiece (such as I did), applying a couple of coats of Zinsser Bulls Eye Shellac onto the mouthpiece should smooth things out for you."

How would you apply the shellac?

Do I purchase the "standard" shellac as listed at:
http://www.amazon.com/ZINSSER-WILLIAM-0316-SHELLAC-SEALER/dp/B000S6VDIO

I'm a novice at this, so any details can help.

Thanks.