Mike, real cars painted for show quality finish require just as much work as Chas has done on his kits.
It's not so much the 'shine' that their after, it's to try and acheive the'deepest' colouring possible.
Looking at factory finishes, you can tell it's a light spray on job, but a decent spray finish will have so much depth it appears to have no end point. And thats the job of the clear coat. Light reflection/refraction blah blah blah.
Of the 2 I have done over the years, it is something that can send you crazy after 5 or 6 layers of clear, with intricate sanding between coats to remove ANY imperfection, and realising that the final coat has got a dust spec in it, which invaribly stands out like squirrel food on Lassie.
This I think you know, but just thought I'd put it down for others.
As for my paint usage, I can get through 3 kits to a bottle of Gunze/Tamiya acrylic.
I cheat by picking out the closest matching primer colour I can find, that way I can thin the paint more, and get more kits for little expense.
Might be stingy, but less bottles in the rubbish is good for the environment!!
Thats my line, and I'm sticking to it!!