I have to agree that making sure it is running is critical. If it doesn't run you simply have a nicely painted piece of yard art. When I can afford it, I take the big pieces (rims, sheet metal, things with lots of crannies) to a sandblaster and let him work his magic. When I am poor (like now) it is stripper and wire wheel time. I have found that a little stripper sure makes the paint come off a thousand times easier. I tried spraying stripper and then hitting it with a pressure washer. Worked pretty darn good. The touch up or hard areas is done with a wire wheel. Make sure you are using a mask, it can get nasty wire wheeling. I have a tendancy to wire wheel even before it is running since it is essentially free to do that. I don't put top coat on until it is running. I will hit it with primer so it doesn't flash rust on me. I found that the most reasonably priced wire wheels are from harbor freight on special. I just picked up a couple for $3 a piece instead of $6. If you want a copy of the ad let me know. I have a couple of sprayers (not hlvp so I cam't speak for them), but I have found that my touch up gun ($9.99 special from Harbor Freight) has worked the best. My compressor won't handle hlvp so I am stuck using the suckem type. It allows control of air volume, paint volume and spray width. In terms of thinning paint, it takes a little trial and error. Start with what ever the can recommends. It all depends on what size tip your gun has (the smaller the tip the thinner it would have to be). I usually mix it up so that it drips off the end of my stir stick and doesn't make a spash up like water does when it drips into a pool of water. Sometimes I find that the stuff is still too thick and so I add just a smidgen more since it doesn't take much to change the viscosity. One thing I learned was that trying it on some scrap metal is well worth the wasted paint. I also shot all my cast metal first since that is much more forgiving compared to the sheetmetal. Granted my sheetmetal didn't come out quite as well as I had hoped, but it was a lot better than if I had started with it. Also make sure to put on thin layers. Thick layers will give you goopy, runny uggly paint jobs and you then get to redo it, which I hate.
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