in my opinion, any tool that is considered a noob tool(cloud filter, liquify, etc. etc.), while they are quite simple in themselves, and CAN be considered "n00b" i believe that if you use all of the "n00b" tools in conjunction with other features in photoshop, then you can't go wrong. I'm going to have to tell you honestly, that i use the cloud filter ALOT in my pieces, if you modify the clouds with a few custom made brushes, and some more "fidgeting" then you can make simple "n00b cl0ud5" into an extrememely nice texture. In all reality, i don't even personally feel that the liquify tool is noobish, if you have a "gun and a motive", then you can't go wrong in my opinion. Off topic slightly, the only thing i feel that's "noobly" is filter whoring, where you just apply a bunch of preset filters to create an effect; I've seen lens flare -> duplicate layer -> blur -> invert -> ripple -> emboss, filter whoring millions of times, where the people just apply millions upon millions of filters to the same settings each time, and get the same effect, and call it artistic... This is obviously just my two cents, but i don't really see anything noobish about thorn's piece whatsoever..
what i WOULD reccommend to you thorn, is applying one of my favorite simple effects to use in stock/near final product stages:
1. merge ALL layers, or create a new layer on top of all other layers, and press CTRL+SHIFT+ALT+E, and i believe this will "stamp" all layers underneath the current layer, onto that layer. if you don't use the keystroke above, then just merge all layers, and duplicate the single layer you have left.
2. judging by the size of this piece, i'd gaussian blur it by about 3-4.
3. press CTRL+U(or if this doesn't work, then find the brightness/contrast modifiier) and up the brightness to around 40, depending on how much "glow" you want on the piece, you can also up the saturation a bit also(to intensify the colors).
4. set this layer on blending mode "overlay"
this should add a very nice glow to the entire piece, it'll add more depth, and add a much more "warm" feel to the piece. here is an example of what it should look like(the image's instructions are a bit off, follow the instructions above)
try this, and for a final note: i think the piece looks very nice, it has a cool "mexican food touch" to it, just like MD said
EDIT: sorry for the ton long post.