But, I have seen some of these that look very good with a few mods - like you mention.

Here are some photos of the Impreza I shot on my iPhone

It doesn't look bad at first glance.




But on closer inspection the are no aerials and no RAC rally 'placard' on bonnet...



...poor decal alignment partially covering air intake...



...and more poor decal alignment: Pirelli to right of registration plate, skewed '555' logo, damaged Repsol logo.

I have no idea what Mitgluisco Ltd. is LOL