To get a nice object for the presentation of our capabilites, i tried to print a Porsche Carrera GT. The model is from the sketchup gallery (link) and was heavily modified to get it printable.
I printed this model in blue PLA with a layer height of 0.25mm on my Rapman. After printing i made some experiments to see if i could get a nicer finish. I first sprayed the model with some putty and tried to sand down the fine layers you get from the printing process. This seemed to work fine, so i painted it in some nice metallic color.
Here you can see the final object:
The paintjob isnt the best, but this clearly proves that you can sand and paint your printed PLA objects to make them look much nicer.
This object is also on thingiverse as object 4984.