It is very difficult to paint an entire car the first time out. I painted my car in a friend's garage, doing it in pieces over a 7 month period. I thought it would not match and i had full intentions of painting the entire exterior once finished. The rebuild has been chronicled on my cardomain site:
http://www.cardomain.com/ride/2219901
You have a lot of good information in the posts above. The only recommendations that I would make over and above what you have been told to date are:
- Use the proper primers (etching for bare metal and high build for blocking out) suitable with the type of paint you are using.
- Never use any power or air sanders after you start priming. Use sanding blocks, long boards, etc and do it all by hand. I would suggest the same for smoothing out any type of body fill as well. (before you start priming) The only way to get a feel for what you are doing is to do it by hand.
- Practice your technique on pieces that are not going to show.
- If painting in pieces, get enough paint to do the entire car, do NOT pre mix it all, but only mix what you are going to use at the time. Mix it the same each time you paint (i.e. 1 to 1 for the base coat and 4:1 for the clear), use the same air pressure each time and finally use the same number of coats of paint and clear. I went with 3 coats of base and 4 of clear. That gave me enough clear to wet sand and buf without the concerns of burning through the clear.
- do not use the same spray pattern for every coat of paint, especially if painting with a metallic paint. You might find that you have a zebra effect with the tint. I usually go the same way for the 1st and 3rd coat but perpendicular on the 2nd coat. This will fill in and cover better.
- Hold the gun at a uniform distance to the panel when spraying.
- With respect to the paint gun, I have had good luck with a DeVilbis HVLP Finish Line gun that cost about $100.00. I run it at about 40psi at the regulator which is about 30 at the nozzle. There is some overspray at that pressure, no where near what a high pressure gun will produce, but there is some.
- Get a good mask, irregardless of whether or not you think you are creating overspray.
- Prep is the most important part of any repair job and then comes a clean environment to spray in. I usually stop work the day before I spray and clean the shop and then wet down the floor, blow off the car, etc. I then leave the shop and come in the next morning, wetting the floor down again and take a tach cloth to the area to be painted. I then spray the area, making sure to leave time between coats.
I think I have babbled enough here, I wish you luck with your. There is a lot more pride in cruising in your own work versus someone elses.
Regards
/paul