Parts Express also carries the Tinnit. Haven't tried it (yet), but from a previous thread regarding tinning home etched boards, conformal coating was also suggested. Online at Mouser the stuff was ~$20 a bottle, so I didn't go that route either. However in a recent trip thru Fry's, they had some of the MG or GC conformal coatings (can't remember which brand) for a reasonable price ($5-$6), and actually had all 3 flavors in stock (unlike many/most of their other stuff), so I will probably try that if I do any more boards in the future.