My "spray method" tutorial is here. There are just a few pages in this thread. I recommend reading all of them. Should answer any questions you have about sealing the discs. I will add that I am now using Ridata G05 DVD-R. Ridata's printing surface blows away the Verbatim media I used to use. I figured because the Verbatims were more expensive, they had to be better (...NO!...). The Ridatas are much cheaper and I've never had a coaster or reading issues. Just bought 100 for $26.99 from supermediastore. The printing surface color issues I had with Verbatim do not happen with Ridata, although I still like to spray the discs to have a glossy, waterproof, uv protected coating.