It's easy peasy engraving with Shellac... you should take one of the nail art classes, you'll learn so much and your clients will be so impressed. For those ones I just applied one layer of cream puff cured and then applied the tropix... I used a dotting tool to engrave my design and had to clean the tool a few times as I did it so the design didn't look messy... once I was happy with it, I cured and that was it... that was actually my first time to engrave on a client. You should practice on some tips, just make sure to clean the dotting tool so you get that nice finish.
Cool glad you are getting on with it, I am not a facebook fan, I find Twitter so much more simple and it is easy peasy once you know how. You are welcome about the re tweet too.. got to support our trade! Rachel x