If you've just spent $1,000., $1,500 or $2,000 on a steel-framed bike and are worried about $15 on some Boeshield T-9 or other framesaver then maybe you should step back and reconsider your priorities.
What about spraying in some metal primer as an inexpensive option?
And just to throw an totally different alternative in to the ring, has anyone tried or even heard of Zinga? See:
http://www.zingacanada.com/ (There's probably a US distributer as well).