JC, that's right, Rustin's is classic shellac + alchogol + some secret ingredients. Few drops of linseed oil and go ahead!
The final finish (layer) I make in a little bit different manner using Liquid Wax from the same Rustin's and polishing. But last time I have found Stock Sheen and Conditioner from Birchwood Casey works best! The surface got very noble lustre finish and you never guess shellac been used.
Many people say: I don't like shellac, the varnish looks too thick to me.
That's right, because shallac been used in not right way. The layer has to be thin and all pores have to be filled up before shellac application.
JC, if you want to try French Polish (shellac) plz don't forget all ingredints you used before FP application (linseed oil, Danish oil) have to be very dry.