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Location:
Yarrawonga Victoria
Registered:
August 2004
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 Info on air compressor
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Mon, 30 August 2004 11:32
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This is a really stupid question, but i am going to attempt painting my 1975 celica myself. I have no experience in this at all and any help at all would be welcomed!
The original question though was when looking at buying a gun and a compressor i wasn't sure with what to get.
Is there any difference to the quality of a paint job if you use a 20 litre compressor when compared with a job done with a 50 litre compressor?
If so is it worth the extra outlay!
And how much is a good gun worth? I have seen some advertised for about 50 bucks but i was told that the guns with the canister on top are better but i can't find any.
Thanks very much
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Location:
Land of Oz
Registered:
June 2004
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Re: Info on air compressor
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Tue, 31 August 2004 05:18
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Hi,
A larger resovoir is better to have. The smaller tanks will lose pressure more quickly as you spray and the motor will need to come on more often to fill it up. This means the pressure fluctuates more often and that can be detrimental to your spraying job.
I have a 50litre tank but most of my spraying is air-brushing and this uses little air and pressure and therefore the motor doesn't switch on too much. However, an air brush requires less pressure than a full sprayer (that you will need) and the cut-on pressure (to recharge the tank) is more than what the air-brush needs, so I don't notice it.
Also, the bigger tank allows for more variety of tools and I can attach not only a spray gun, but also air-hammers, air wrench and air-nailer and riveter.
A 50ltr tank is a little more expensive than the smaller units but it allows more tools and versatility. They cost from around 130-200 dollars, which isn't much and put out 150psi. I suggest you buy the 50ltr unit and spend a bit of money on getting a decent spray-gun. Poor/cheap ones will allow the paint to come out blotchy and uneven.
And, keep the spray gun mega-clean at all times, 'cos a little bit of shit or dried paint in the delivery system can cause major headaches and uneven paint etc.
Hope this helps.
seeyuzz
river
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Location:
townsville NQLD
Registered:
February 2004
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Re: Info on air compressor
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Tue, 31 August 2004 07:06
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yeah definitly go the big one, im in the process of painting my 79' celica and ive been using the spray gun and while im painting, the motor is always on, same as when im sandblasting. i think mine is a 50 ltr think  , but i'd prefer a bigger compressor any day, but a 50ltr will b okay. nyway hope u go well with ure spraypainting dude, this is pretty much my first time too. im going all the way back to bare metal and etch priming it all (fuk that stuff is thick). and the other thing, always check ure gun is sucking proply b4 u start painting or it can cause some problems later on after u have mixed the paint, started painting and released u might have to pull it apart. (know from experience  )
another thing to remeber - lots of light coats are better than fewer heavier coats
hope it helped
brett
[Updated on: Tue, 31 August 2004 07:13]
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Location:
Brisbane
Registered:
June 2003
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Re: Info on air compressor
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Tue, 31 August 2004 07:12
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The compak one we have at home seems to do a great job, i dont know what size in letres it is, but it was about $700...so the size around that price 
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Location:
Yarrawonga Victoria
Registered:
August 2004
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Re: Info on air compressor
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Tue, 31 August 2004 08:31
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Thanks heaps for the advice!
I talked to a few panel beaters around and what they say is pretty much excatly what you guys said. However something i thought i'd share was one of the panel beaters had a great idea on how to get a cheap, professional job. Call your local tafe and ask if they need a project car for the budding apprentices to work on! I'm ringing the local tafe tomorrow to see, but its worth a try if you can't be stuffed/afford painting and beating yourself.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: Info on air compressor
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Tue, 31 August 2004 08:36
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| nuff wrote on Mon, 30 August 2004 21:32 |
Is there any difference to the quality of a paint job if you use a 20 litre compressor when compared with a job done with a 50 litre compressor?
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the quality of your paint job is in the preperation leading up to and when painting the car, not really the size of compressor you use.
having said that, the smallest compressor i would use for a full car respray is a 12CFM one with 40-50 liter tank as ones smaller do run outta puff too much like river mentioned. i have used a 10CFM 25ltr tank compressor before, it was ok doing small panels at a time.
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Location:
Canberra, ACT
Registered:
September 2002
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Re: Info on air compressor
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Tue, 31 August 2004 15:45
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A can of worms you have opened Compressors are like any other part of fiddling with cars... It doesn't matter what your budget is, as you'll easily be able to find an excuse to spend ALL of it
Haven't done any painting yet, but I have used my electric compressor a lot for the die grinder and rattlegun. it has a 1400mm (length) x 400mm (width) tank (NFI what that is in litres, sorry), and can sustain 270-odd litres per minute at I think 90psi. It can run the die grinder at full speed for *ages* without the motor running, which is nice.
You'll be wanting a good water separator.
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Location:
Canberra
Registered:
May 2002
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Re: Info on air compressor
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Tue, 31 August 2004 22:08
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If you're looking for a cheaper way out, two $99 GMC compressors in parallel do a surprisingly good job for the money.
They are loud though...
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