The first model I did was the long rail gun, it was basically the same design that I am still making but I've revised a bunch of things on it. The original printing quality was crappy and cleaning it up by hand didn't help it much as a lot of the detail lost some of the hard edges and the lines weren't all that straight.
When I reprinted the rail gun I made a few tweaks to the model, namely adjusting the various depths of the panel lines. The original print had all the basic geometry as the current version but a few lines and raised detail were so shallow that they didn't show in the inital print. After the cleaning you couldn't see the weak details as they were removed, but you could see marks on the master print where they were supposed to be but they were too small on the computer model to print properly.
This is the updated model that benefits from the 3d mesh being redone with printing constraints in mind and also a kinder cleaning in place. It has the benefit of additional 3d experience but also a lot more experience with the cleaning process with the prints. I don't clean them quite as agressively and go a lot slower now. Very tedious but it makes for a much better sculpt.
The battlemechs being my newest work show the progression and also have some much tighter areas in terms of scale and detail. They also benefit a bit as I was following pre-established designs so I didn't have to create as much in my head as something that's completely new, it's always easier to copy something than raw scratch building.
At this point I think I'm able to take the modelling past what the current printing capacity is with moddler and I'll be trying some of the companies that Mad Robot has been using. It's significantly more expensive but I think the print quailty may let me make even finer details.
I'm still a huge fan of moddler's service so I will likely continue to use them for test prints or models that aren't over the top on detail. I'm looking at doing some 15mm scale stuff which is probably too fine of detail for their printer and will need the higher end stuff.