Can someone explain what happened here?

DanMcG

DanMcG

Promoted Users
Wednesday I finished welding in a cab corner and partial rocker, so I mixed up enough epoxy to shoot at least 4 coats, 2 before filler and 2 after. Shot the bare metal on Wednesday and Thursday morning I did the filler work then the last two coats Thursday afternoon.


The first two coats went on and leveled out nicely, I capped the pps2 cup, cleaned the gun as usual. The next day I stirred up the paint in the cup, and all seemed normal, then I sprayed a test pattern and it was textured, I played around with the gun settings and nothing seemed to change.Rain was in the forecast so I had to shoot it. (working outside)

I got the worst textured paint I ever seen.

Can you not shoot 24-hour induced paint? Was the 80 plus storage temp to hot? could my nearly year old activator cause issues?
Is there a factor that could cause the epoxy to kick on me? Had a bitch of a time cleaning the gun as the lacquer thinner wasn't cutting it, I ended up using reducer to remove it from the gun.

Here's what I was dealing with. It would make for a good interior trim texture.
IMG_6054.JPG


This is what the needle looked like maybe 10 minutes after I started. An the brush in the background wouldn't come clean either
IMG_6055.JPG
 

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DanMcG said:
Wednesday I finished welding in a cab corner and partial rocker, so I mixed up enough epoxy to shoot at least 4 coats, 2 before filler and 2 after. Shot the bare metal on Wednesday and Thursday morning I did the filler work then the last two coats Thursday afternoon.


The first two coats went on and leveled out nicely, I capped the pps2 cup, cleaned the gun as usual. The next day I stirred up the paint in the cup, and all seemed normal, then I sprayed a test pattern and it was textured, I played around with the gun settings and nothing seemed to change.Rain was in the forecast so I had to shoot it. (working outside)

I got the worst textured paint I ever seen.

Can you not shoot 24-hour induced paint? Was the 80 plus storage temp to hot? could my nearly year old activator cause issues?
Is there a factor that could cause the epoxy to kick on me? Had a bitch of a time cleaning the gun as the lacquer thinner wasn't cutting it, I ended up using reducer to remove it from the gun.

Here's what I was dealing with. It would make for a good interior trim texture.View attachment 26402

This is what the needle looked like maybe 10 minutes after I started. An the brush in the background wouldn't come clean either
View attachment 26404
Click to expand...

What was the humidity level at for Wednesday and Thursday?
You have several things going on here. You sprayed two coats of Epoxy on Wednesday, then applied filler Thursday morning. It's been explained over and over, 48 hours cure time before filler for best results. How long did you mix the epoxy, and did you strain it for the 2nd spray out on Thursday afternoon?

Seems to me you're rushing things by not letting epoxy and filler gas off and dry out, This is what happens when you pile material on before it has had time to dry out enough to except more product.

I've sprayed 48 hours induced epoxy over filler with no issues in 90 degree temps.
 
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Since it set up in your gun I’m guessing storage temperature was too high. Did you reduce the epoxy?

Maybe store it in the house next time.

Don
 
By the way, I have heard of this problem storing in the different disposable cups in the past, not a lot but off and on.
 
MJM said:
What was the humidity level at for Wednesday and Thursday?
You have several things going on here. You sprayed two coats of Epoxy on Wednesday, then applied filler Thursday morning. It's been explained over and over, 48 hours cure time before filler for best results. How long did you mix the epoxy, and did you strain it for the 2nd spray out on Thursday afternoon?

Seems to me you're rushing things by not letting epoxy and filler gas off and dry out, This is what happens when you pile material on before it has had time to dry out enough to except more product.

I've sprayed 48 hours induced epoxy over filler with no issues in 90 degree temps.
Click to expand...

I have rarely waited more than overnight for filler per several conversations with Barry.
 
dhutton01 said:
Did you reduce the epoxy?
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No, no reducer. It didn't seem it needed it when remixing.

Barry said:
Disposable cup not airtight?
Or had a filter in it.
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the plugs to cap it off are pretty tight but I guess it's possible it wasn't airtight.
No filter, I learned that lesson already

Day time temps were in the 90's humidity was maybe in the 50's
 
the manual says to wait overnight before filler, and also say's for best results wait 24-48 hours.
 
MJM said:
What was the humidity level at for Wednesday and Thursday?
You have several things going on here. You sprayed two coats of Epoxy on Wednesday, then applied filler Thursday morning. It's been explained over and over, 48 hours cure time before filler for best results. How long did you mix the epoxy, and did you strain it for the 2nd spray out on Thursday afternoon?

Seems to me you're rushing things by not letting epoxy and filler gas off and dry out, This is what happens when you pile material on before it has had time to dry out enough to except more product.

I've sprayed 48 hours induced epoxy over filler with no issues in 90 degree temps.
Click to expand...
None of this. Epoxy needs to sit for 48 hr prior to poly primer. Over night for body filler is fine. The perfect paint job says that and this is also the way I’ve been doing it since 2010.

How would rushing any of this make the epoxy set up in the gun like it did? It wouldn’t.
 
The only time I have seen that is when I have tried to use epoxy I have tried to keep for 6-7 days. I have kept it with no issues for 2-4 days in the in a sealed cup. I did notice during this hot spell (95F) that it was gummed up in a mixing cup in just 24 hours with no lid on it so heat and not sealed well can make it kick much faster.
 
OP I think your temps and storage condition caused your epoxy to kick faster than it normally would.

I typically would just put Saran Wrap or foil over mixed epoxy in my mixing cup and store it for up to several days, this is by no means air tight.

I’ve since started using the Spectrum disposable cups from Harbor Freight (which are pretty good). A few days ago I left the epoxy in the cup overnight, capped, but it is very hot. Over 90 degrees in my shop. When I sprayed it again the next day the epoxy did not shoot slick and had some slight texture to it.

I figured it had just kicked faster at those temps (the pot life times are based on 70 degrees or somewhere in the 70’s). However after seeing you experienced this too (but to a worser extent) and we were both storing it in disposable cups I think there could be something to that.

It kind of makes me want to split a cup of epoxy between mixing cup and spray cup and see if there’s a difference the following day.

OR just bring the cup inside instead of sitting in the heat.
 
MJM said:
Then why has it been said here over and over for best results for wait 48 hours before applying filler?
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It’s been said here over and over that is for poly primer. The guidance has always been overnight - 24 hrs for body filler.

Barry has always said overnight.

I just put filler on at some point the next day.
 
I see a few members have a problem with me. I've tried to ignore those members but they just want to make me look like a fool ever time I post.. Being the nice guy I am, I don't want them to suffer anymore emotional distress due to me so, as the saying goes, I'll just take my ball and go home. It's not me your really hurting, It's SPI since I won't be using anymore of their products. Money is not an issue for me so I'll just use PPG or Standox.

Oh and Lizer, you really should learn how to lay down sealer without having to sand it. You'd think after 10 years you could figure it out. I had no problems doing it my 1st time. I won't comment on your metal work, it speaks volumes.
 
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i experienced the same thing about 3 weeks ago. i mixed up epoxy. sprayed it. next day, did filler work. but it was about 48hrs after the epoxy was mixed that i sprayed it again. it was in a master paint systems disposable cup, similiar to HF and PPS....i figured it was due to extreme temps (97 degree) , should have stored it inside at 74 degree. wasnt a big deal, it sanded just fine.
 
MJM said:
I see few members have a problem with me. I've tried to ignore those members but they just want to make me look like a fool ever time I post.. Being the nice guy I am, I don't want them to suffer anymore emotional distress due to me so, as the saying goes, I'll just take my ball and go home. It's not me your really hurting, It's SPI since I won't be using anymore of their products. Money is not an issue for me so I'll just use PPG or Standox.

Oh and Lizer, you really should learn how to lay down sealer without having to sand it. You'd think after 10 years you could figure it out. I had no problems doing it my 1st time.
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Nobody is trying to make you look like a fool when you post, but the reason this forum is as good as it is is because the information is always GOOD, and if somebody posts bad information it gets corrected. I hope somebody corrects me too if I say something incorrectly.

Regarding sealer, I spray it unreduced so I have full strength and sand it so I can always have a perfectly flat and nib-free surface prior to base. For small parts I do reduce it 10% and it will spray slick.

There was a new guy that posted a question, made kind of a silly rookie mistake with his epoxy and you mercilessly berated him over multiple posts. That offered no help, it was just simply berating him. And you never apologized. That was classless and that changes my opinion of people. So yeah, I did have a problem with you over that.
 
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Well I'm going to chalk it up to being stored overnight in too hot of conditions. That's not something that happens often in Central NY. Thanks for all the feedback!
 
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