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Hi I have sprayed 2k hs clear Coat on my tractor roughly about 4 months ago and I can still leave a finger mark in it. It was sprayed in about 10 Celsius and I left it in the sun last week all week in 25 Celsius heat but is still not hard can anyone help me fix this thanks
 

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Cars, Trucks, Boats, Motorcycl
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Hello,
Welcome aboard...
Where are you located? Ours off to right ====>

Did you add hardener to it?
 

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10° Celsius (50° Fahrenheit) is a little cold for painting without a heated booth, and of course as Buzzlol says, did you add the correct activator (hardener) and mix it correctly (if you were in a heated booth that is).
 

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True Hotrodder
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One, the hardener was bad or improperly mixed and is not cross linking. Two, applying it that cold is at best difficult but with the temp up to 25c, it would have set if #1 was okay.
 

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Yep, if it hasn't hardened by now, it never will set up. Catalyzed paints dry by the cross-link chemical reaction, not by solvent evaporation or heat/sunlight.

You could bake it an it still won't get hard...it might skin a little tougher, but if you were to cut through the skin you'll find it still gooey under the surface.

You don't have much choice but to either live with it soft, or strip it off and do it over.

Hardener was likely bad...it has a shelf life, and some brands don't like freezing either..

Also, if you open a can of hardener, use it up is 4-6 months or throw it away
 

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if hardener has gone bad does that mean it just doesn't harden or can that cause problems later on?
 

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One, the other, or even both. Bad hardener/catalyst is un predictable, and you could have a good outcome, or a mess. Why risk it?
 

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One, the other, or even both. Bad hardener/catalyst is un predictable, and you could have a good outcome, or a mess. Why risk it?
if its questionable you could spray a test panel before you do your real job to make sure its still good. for example, i got this gallon of clear for a couple guitars and have used maybe a pint of it so not much hardener used at all. i doubt its gone bad.
 

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if its questionable you could spray a test panel before you do your real job to make sure its still good. for example, i got this gallon of clear for a couple guitars and have used maybe a pint of it so not much hardener used at all. i doubt its gone bad.
Once the seal is broken on the hardener can, the clock is ticking, it has been exposed to air and now has a possibility of degrading....even if you only used 4 oz out of a 16oz can, once it is 6 months old throw it out and replace it.
The gallon of clear will shelf life longer...but the hardener won't.
 
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