the reverse application may be referring to a technique that i've been using in the salon for a few yrs now.
i have explained it to a few geeks, as it is how my nails are done.
its not easy to describe without pictures, but i will try.
a form is applied and zones 2 & 3 are applied 1st.
zone 2 is left top heavy.
remove form and file shape of free edge into desired shape of eventual smile line.
apply new form, apply zone 1 in chosen colour, butting up to smile line.
apply clear over both applications if neccess, to build up any gaps.
finish nail as usual.
i did a step by step photo shoot of this technique for my portfolio in the summer, and have been promising it to kat from pro nails eversince:o
this post will make sure that i send it to her asap so that she can publish it!