isocyanates

[vtechnician]

Which of the 3 ingredients for 2k paint has the harmful chemical? Is is it the paint, hardener or thinner? Or combination?

 

[the snooper]

the hardner / activator

 

[vtechnician]

Thanks. For the sake of practice. can i leave out the hardener? what would the ratios become for paint + thinner. Originally it was 2:1 + 10%. Not sure whether hardener and thinner have same viscosity.

 

[the snooper]

no you cant leave out the avtivator as it will just sit there wet for weeks, if you want to practice i would get hold of some cellulose

 

[Mr J Morton]

I did that once painted on 2k on a test swatch with a brush and forgot the hardener...three weeks later I took it off with thinners as it hadn't even nearly dried. I found out when I sat on it and it stuck to my jeans

 

[vtechnician]

cheers! my gun is 1.4mm is this ok for celly?

 

[vtechnician]

in the interest of setting up my gun would paint + thinners do the job? Id like to see how the atomisation/over spray varies with pressure.

 

[the snooper]

your gun will be ok for celly
as for setting up your gun you need the real thing in it and each time you spray you will probably make slight adjustments to the gun anyway
i notice you did a test with water which really will tell you nothing as its very thin compared to paint
even if you get celly and practice it will still be different using 2k with celly you tend to chase the paint so as not to get dry lines / patches where as 2k flows a little after its applied so all paint is different.
if you will be using 2k the only way to practise is with 2k fully mixed
its like trying to weld using standard wire with no gas it just cant be done

 

[marc76]

If the spray pattern was changed from say..wide fan to round/spot I know the paint gun needle needs adjustment as well. At the trigger that is less stroke. Also, if you are unable to access the work area properly, for example when spraying crevices, and the gun moves little as none, I know it's the right way. I found that the compressor manometer is never observed while spaying actually. With intention that is, because I am more concerned with paint flow and thinning. In fact, I always back down pressure to as low as possible settings i can use, but I will admit that weren't body panels and lots of paint. Hope this helps.

 

[vtechnician]

your gun will be ok for celly
as for setting up your gun you need the real thing in it and each time you spray you will probably make slight adjustments to the gun anyway
i notice you did a test with water which really will tell you nothing as its very thin compared to paint
even if you get celly and practice it will still be different using 2k with celly you tend to chase the paint so as not to get dry lines / patches where as 2k flows a little after its applied so all paint is different.
if you will be using 2k the only way to practise is with 2k fully mixed
its like trying to weld using standard wire with no gas it just cant be done

Makes sense! should learn not to cut corners so much! thanks for advice!

 

[pedrobedro]

in the interest of setting up my gun would paint + thinners do the job? Id like to see how the atomisation/over spray varies with pressure.

Get some primer and cheap thinners for messing about so it doesn't cost you much to learn and you will still be able to use it for priming before you paint on another job