have a look in the 'auto' forum section and look for the one labeled "Nice '63 Corvette". it was on the second page when i just had a look at it.
mbie has used an airbrush to paint his models so if you ignore the paint thinning and just read the actual technique he has used to paint the model you won't go wrong :)
i prefer to wash the model in a white spirit instead of using washing liquid. you can paint just about straight away after washing and shouldn't have to worry about the crevaces trapping water and surpizing you when you start painting.
set up a piece of paper on a vertical survace and practice moving the can in fluid even strokes accross the paper (try a piece of paper with a bit of gloss to it ie butches paper). on one piece try varying the distance of the can from the paper. you will note that up close the paint will run but too far away it will appear dusty. you want the paint to be applyed just so it doesn' run this it what is refered to as 'wet'.
on another piece try coating the whole surface evenly. start from the top and work your way down. remeber that you are better to more strokes of the can and get a better finish than rather trying to do a one coat wonder. once finish look at the paper up close at different angles. if you have done it properly the paint should be evenly covered and have an even gloss to it. with a bit of practice you will soon learn what distance, can speed and nozel compression you will need to get the 'good finishes'. waste one or two cans practicing. in the long run it will be worth it, rather than producing models that you are unsatisfied with.
when finish spraying hold the spray can upside down and press the nozel. you will see the spray change color. this helps the nozel keep clean. (i think on the side of the canit usually tells you to do this.)
when you have mastered the spray can, you might want to invest in a airbrush. for short term modelling they are a bit expensive but for the serious / semi serious it will save money in paints and also usually give you better control of paint aplication. but stick with the cans for the first few models. they will give you the basic skills of spraypainting.
the best way is to learn i think is have someone show you (practice will do it to, but you are better off learning from other's mistakes. and rember you always have us at the forum to talk to :) ). a panel beater will also be able to help you and tell you how to get a good finish. my airbrushing skills have doubled since i learnt how to spraypaint on a large scale.
magor