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I put down the first floor on top of luan underlayment. It is NOT coming up..believe me I tired. It wasn't worth the fight. Even if I got the vinyl up, I would have to remove the adhesive...with nasty chemicals. I am thinking of a great invention...this leveling stuff in colors, just slosh it on and you have a new floor...
I have been doing uber amounts of research lately for my upcoming kitchen remodel, and I just started looking into floors. I may be wrong here, but I thought that that levelling stuff would not adhere well to an existing vinyl floor, and that it should be put down only onto the cement or subfloor once the old vinyl is up......I could be totally wrong.....