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PostPosted: Wed May 04, 2005 11:13 am 
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yeah, will be good to see the results! (plus then youll be geting alot more bus Anton, you can leave work and do cash in hand spray jobs for everyone! :lol: :lol:


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PostPosted: Wed May 04, 2005 11:19 am 
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hmm.. methink i'd need some practice panels :)

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PostPosted: Wed May 04, 2005 12:05 pm 
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my dad bought that same gun to spray my car
havnt used it yet but we will see what happens

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PostPosted: Wed May 04, 2005 12:36 pm 
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Location: Sydney - strangely, I am glad of the sight of hills!!
i'm not a painter, but i used to sell the stuff, but industrial not automotive. only difference is the colour range and gloss level.

2pak means a 2 part paint system where part A is the base and contains the majority of the polymers, pigments and solvent. Part B is a hardener and contains some more polymers, solvent and a catalyst. The catalyst helps the two polymers to link up in a chemical reaction that hardens the paint, but then the catalyst gets the hell out of there by evaporation.

The reason that you need a booth and a full BA suit when spraying with these systems is because the catalyst in the part B is di-isocyanate in most. This is REALLY nasty crap, it is a known carcinogen (causes cancer, and with very low exposure levels too), it destroys your mucous membranes, strips the linings from your lungs. DO NOT spray this stuff without a booth for your own protection, screw the neighbours.

The single pack systems are far simpler, only having a solvent base that contains the polymers and pigments. once you spray it on the solvent evaporates leaving the polymers and pigment behind. That is why they are a much softer paint.

It is possible to get industrial paint that has a hardner without di-isocyanate, but i don't know about automotive. If you want to be around to see your kids grow up, then check with your paint supplier if they can give you di-isocyanate free 2pak, otherwise stick to acrylic if you don't have a booth and BA gear.

This has been a Mini public safety announcement
end transmission

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PostPosted: Wed May 04, 2005 12:41 pm 
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I was just about to say, 2 pack packs a punch! it's nasty stuff apparently... it aint a simple task of spraying and smelling the paint while it dries! :shock:

It's deadly! gas masks with supplied air, whole body protection etc etc... it's not a walk in the park by the sounds of it!

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PostPosted: Wed May 04, 2005 12:43 pm 
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So this di-isocyanate stuff, is it effective on neighbours?
:D :D :D


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PostPosted: Wed May 04, 2005 12:44 pm 
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why would people invent such a substance ? : )

much like cars really...

flash back time :)

woo...these the are going fast now...people are dying....better develop some system to allow us to keep driving like this ..ahh... seat belt..... oooh... cars getting faster.... we need something more..... enter airbags.....etc:)

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PostPosted: Wed May 04, 2005 12:56 pm 
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Location: Sydney - strangely, I am glad of the sight of hills!!
Harley wrote:
So this di-isocyanate stuff, is it effective on neighbours?
:D :D :D


more damage to yourself than the neighbours unfortunately, the stuf would disperse enough to have too random an effect.

but if the wind was in the right direction and you happened to have some styrene and chlorine or bromine lying around ........ did somebody say tear gas? :shock:

Quote:
why would people invent such a substance ? : )


everything is a compromise eh :roll: hi octane petrol has a high aromatic content which means lots of benzene rings and other benzene like hydrocarbons. The rings are harder to break chemically than the chain hydrocarbons, hence the higher octane. But guess what - benzene and other aromatic hydrocarbons are also known carcinogen........


sorry Anton - hijacked the thread there. crap i haven't even looked at the spray gun yet i was so concerned with everyones safety. right you lot get back to your welding in thongs, grinding with sunnies on etc :D

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PostPosted: Wed May 04, 2005 1:07 pm 
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mickmini wrote:
......right you lot get back to your welding in thongs, grinding with sunnies on etc :D


or in gafmo's case.....lifting motors and gearboxes with barefeet..... :lol:

Excellent info Mick. Definitely food for thought..... 8)


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PostPosted: Wed May 04, 2005 1:17 pm 
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JAM et al, while on the subject of painting. When I sprayed the engine bay recently I bought two litres of Acrylic (Sugar Cane). I then thinned it 1 to 1 with thinners as described on the can. This seem to make it so thin that it ended up dripping out through the tip. What did I do wrong? I got the impression it would have come out brilliantly if I hadn't thinned it at all? Whereas when I sprayed the subframe with enamel (acrylic) I just stuck it in and sprayed and it came up a treat. A bit of real advice appreciated (as I read up tons before this attempt!).

Cheers

matt

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PostPosted: Wed May 04, 2005 2:25 pm 
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minstar wrote:
JAM et al, while on the subject of painting. When I sprayed the engine bay recently I bought two litres of Acrylic (Sugar Cane). I then thinned it 1 to 1 with thinners as described on the can. This seem to make it so thin that it ended up dripping out through the tip. What did I do wrong? I got the impression it would have come out brilliantly if I hadn't thinned it at all? Whereas when I sprayed the subframe with enamel (acrylic) I just stuck it in and sprayed and it came up a treat. A bit of real advice appreciated (as I read up tons before this attempt!).

Cheers

matt



spray gun nozzle size?? air/paint ratio?

You can adjust this on a HVLP gun. I found winding the adjustment ALL the way out, then in a very slight amount (1/8 of a turn) was the right ratio. Any more than this and it was a bit like your experience.


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PostPosted: Wed May 04, 2005 5:08 pm 
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 Post subject: spray gun
PostPosted: Wed May 04, 2005 6:49 pm 
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What size pot should you get ie 600ml or one litre? what size nozzles are best to use for what?


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PostPosted: Wed May 04, 2005 7:14 pm 
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So am i right in saying that for $45 you get the lot? If so, i will grab one too! Will send the wife down to pick it up.

Cheers

Aaron

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PostPosted: Wed May 04, 2005 7:28 pm 
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J_A_M wrote:
nah, I am a 2 pack virgin. I stuck with what I knew (acrylic) on JAM....but Kev wants his sons clubby in 2 pack so that will be a new learning curve. It's better to paint with 2 pack, coz u spray it and its done. Rubbing back and buffing is hard work.....

Um... we've already got the Monza Red paint, it's just boring old acrylic, not 2 pack.
But, the hi-build primer is 2 pack epoxy. Easy stuff to spray, even with my old gun. :wink:

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