When I used my bare fingers, I didn't think I needed to clean with clay. Then I tried the "baggie test" (taken from a tip in an article here,
http://www.autopia-carcare.com/cleanwitclay.html.
Put your hand in a sandwich baggie, or put a piece of plastic wrap around your fingers. Then run your fingers lightly over your clean, dry paint. If you feel bumps - to me it felt like grains of sand - clay will help.
I just finished my first attempt at claying (hood & roof). It was easy, and, actually, kinda fun. The paint on the areas I've finished is *way* smoother, and even using a plastic baggie I don't feel bumps anymore.
I'm working my way over the Lexus in stages - hood has been clayed and has AIO (2 coats), roof has been clayed and has AIO (1 coat). Tomorrow I'll clay the trunk, rear end and do another coat of AIO for the roof....and so on, until I've gone all the way 'round. That way, my freshly clayed surfaces get a fresh coat of AIO to protect, since I don't have time right now to clay/AIO the whole car at once.
And then comes the SG. MUHAHAhaahahahahahah....sorry, got carried away.
bottom line:
- will it look better? Yes, if you feel the bumps as described above.
- How much better? depends. Mine looks a ton better, IMHO. bnut I've not tried the AIO without the clay treatment.
- How long does it take to clay a large car? I did the hood of the LS 400 in about 20 minutes. Remember, I'd never done it before. I'm also using a QD as lubricant, not doing it with the wash as some here advocate. Reason is I'm doing it in the evening in the garage, and using a QD means I don't need water - spray, clay, wipe. The roof/A & C pillars took me about the same amount of time.
regards,
Andy
[Edited by hook on 07-18-2001 at 08:16 PM]