I have read that both are good for rust-proofing a steel frame, but which is easier to use? Framesaver is apparently pretty toxic and hard to wash off. Thanks.

No issues with framesaver. I think that toxic stuff is BS and it cleans up with paint thinner. I think it's probably boiled linseed oil with a carrier. You can buy Linseed oil at HD and apply it with a turkey baster for alot less $$ than framesaver.