I mean yeah its going to be just as effective as a transdermal test or tran tren (its not going to be exact as in accurate, but you have estimation). As long as you use the base with no ester and a good carrier, I don't see why not. I started a thread awhile back regarding this, because Ive seen Boldenone and Test ran quite often, but no Nandrolone and wanted to see if anyone tried it. Any compound can penetrate into your skin as long as there isn't an ester.