My god, surely the CAN respray is a wind up. If it isnt as wind up, then why dont you just do this.
1. Buy a cheap tent begoda type thing like that use for BBQ's
2. cheap compressor (25l) (~£100) and a cheap gun, (£10-15)
3. invest in some 2litres of paint in the colour you want + 5l thinner.
I hate to think what this must cost in rattle cans and it will be as streaky and patchy as hell.
Spray it HALF properly and in HALF the time, theres no way cans will turn out good. Im doing a garage based respray at the moment on a smart car, but im using the proper gear and its still tricky to get a mint mint finish, you havent got a chance outside).
Are you going to clear coat it? if not fair play, but if you are, no chance of a good finish (Flys, dust, temperature changes, it will be very pot holed and with a can respray you need to cut it back to with an inche of its life to get anywhere near a reasonable finish, which means lots of coats and lots of CANS).
I always admire DIYers, im one myself, but there are certain things which are best left alone if your not going to invest in the facilities to do it. Ill eat my words if you prove me wrong, so i throw down the gauntlet.
Si