I know this is an old thread. A friend sent it to me sometime ago and I never really got a chance to do a proper related post to clarify some of the mis-information presented here, and of course blow my company's horn a little.
Despite the tardiness of my post I am hopeful this may serve to accurately benefit others who are new to the craft of finescale model finishing and have the same question as the initial poster.
Anyhow, here goes.
1. I know of only one airbrush manufacturer who has a lifetime warranty. They are also the only exclusively American manufactured airbrush producer. Yes it is Badger. Badger has a lifetime warranty and anyone who has had cause to take us up on it will testify to its legitimaticy. http://www.badgerairbrush.com/Service-Supprt.asp
Iwata has a 5 year warranty and an automotic $25 clean up and diagnostic charge. http://www.iwata-medea.com/index.php/support/iwata_warranty/
(Badger has no charge to check out your airbrush or for that matter to clean and refurbish it back to proper working condition)
HS has a 10 year limited warranty, which I could not find details on their website, so I cannot speak on the details or the limits of it. I have had numerous users tell me they could not find out where to get their airbrush serviced when they needed to, so it sits out of commission.
2. You do not need to disassemble your airbrush to clean it if you follow proper cleaning procedure. This is for any airbrush. Badger's cleaning recommendation is here. http://www.badgerairbrush.com/PDF/airbrush101printfinal.pdf
3. Badger, Iwata, and HS all make high quality products. They all also have various levels of performance addressed in their product lines. Detail-wise, there are infinitys and HPs and Renegades, - General purpose-wise their are eclipses, evolutions, and Patriots. Arguably in each category Badger's American Made airbrushes are more affordable (another consideration for new airbrushers). Yes, you often get what you pay for, but with reputable products the best is not always the most expensive. Of all of the airbrushes that are recommendable to a new airbrusher, like the poster of this thread, only one of them has a lifetime warranty and the ability to support and stand behind its product with absolute American manufacturer integrity. To the new airbrush user this is a critical difference. Experienced airbrushers usually have less cause to be as concerned about the service and support aspects as the "newbies" do - it's a logical fact of the matter. I know hundreds of high end, experienced, talented, contests award winning Badger airbrush users - they don't use Badger now because of our service and support - they use Badger now because of the reliability of our products and thier confidence in it. The same is true for experienced Iwata and HS users. To the contrary, the new user needs an abundance of product support, and it should be a factor in his deciding which airbrush he chooses. In that regard, I don't care what any Badger naysayer Iwata cheerleader says, Badger is unequaled.
I don't get here that often, so if you want to argue with me about my Badger ownership related, supported by fact, opinions, please feel free to email me directly at kenbadger@badgerthayer.com