Put Too Much Activator in Urethane

B

BUDRICK2009

New Member
Rookie mistake, because I am a paint rookie, sprayed under-carriage with epoxy primer 2:1 which is how it is supposed to be mixed. Then I mixed the urethane base 2:1 as well when it should have been 4:1. It looks good for now, but will it ever cure?

Thanks in Advance.

Mike
 

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Ok title was corrected
So it's ss. Where it's sprayed, you are fine; the extra activator will make paint stronger, maybe depending on the brand but slow down the drying depending on brand.
 
Barry said:
Ok title was corrected
So it's ss. Where it's sprayed, you are fine; the extra activator will make paint stronger, maybe depending on the brand but slow down the drying depending on brand.
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It was the House of Kolor Hot Rod Flat. The epoxy went down fine, I let it flash, I kept my head in the 2:1 mode when mixing the 2 stage urethane opposed to mixing 4:1. I’ve checked it, it seems to be getting harder.
 
Lizer said:
Do you mean 1:1 with epoxy? If you sprayed epoxy 2:1 then you used half as much activator as you should have.
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The ppg tech sheet directed 2:1 on the epoxy for MP 170, I should have brought up the Tech for the House of Color stuff as they did not put one in the shipping box. Of course I look it up out of curiosity when I’m done. I wish that I’d been more curious before hand.
 
If adding more activator makes it stronger, will that also make it more prone to chipping?
 
MJM said:
If adding more activator makes it stronger, will that also make it more prone to chipping?
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We will find out. I know there is more orange peel than I like, fortunately it is on the bottom of the car and still looks 1000 percent better than it did. If it chips too much I’ll probably just undercoat it.
 
BUDRICK2009 said:
The ppg tech sheet directed 2:1 on the epoxy for MP 170, I should have brought up the Tech for the House of Color stuff as they did not put one in the shipping box. Of course I look it up out of curiosity when I’m done. I wish that I’d been more curious before hand.
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Ok. This being an SPI forum, I assumed you were using SPI epoxy since you hadn't specified any differently.
 
BUDRICK2009 said:
The ppg tech sheet directed 2:1 on the epoxy for MP 170, I
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Several years ago someone brought me something similar, same company different name , to put on couple fenders he had to finish out his antique truck. He was going to have that as his topcoat. Rat rod so to speak. 2:1 was also the correct mix for what I used. I didn't like how it sprayed and never used the remainder of it that he gave me. Tossed it out few months ago.
 
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