Camaro Concept over American flag (art project)

Basically, I drew the Camaro concept in pencil and then painted the American flag on a canvas board. Then I cut out the drawing and sealed it on the canvas with a clear sealent. C&C please. The black things in the white stripes are words like "V8" and "Camaro" and "American", etc.

http://i2.tinypic.com/vcrq05.jpg

IMO th back looks a little bit out of perspective
jd

i think the rear wheel should be smaller then the front ^~^

Yeah, I couldnt figure out why the wheel came out like that. But then again, Ive always had a problem with perspective.

i had probloms with perspective too, i draw like 10 new cars that have almost perfect perspective, i draw 2 days non stop to learn perspective batter. (i will post each new car drawing after i'll finish painting it)
here is a good pic of what perspective is.
http://upload.wikimedia.org/wikipedia/commons/f/fd/Table_of_Perspective%2C_Cyclopaedia%2C_Volume_2.jp g

Wow. Thanks for the (large) pic. I understand perspective just fine. Its the fact that 80% of my drawings were never intended to be posted here. I always spend more time on one if I know Im gonna post it here. Cuz they are always just doodles at first. But thanks.

OK that huge pic just threw me off...

sorry about the big pic