What is this. It loos like my epoxy isn't feathering

G

GLHX

This epoxy is set up as a sealer. It went on 1:1:1

At this point I can't tell you what the metal temp was when I sprayed it or what the can temp was either. I don't remember when I kicked the heat on or what the temp was inside the shop. I can say that the cure temp was 71°.

I know this because when I came back to the shop 4 days later I had the heat set at that. I don't remember if I kicked it on before I left or right before I sprayed the car.

This could be nothing. There are parts that I think feathered fine. I've never wet sanded epoxy before. Only dry sanded it and it know before it's fully cured it gums up my paper.

The only reason I noticed this is because in wet sanding. I'm getting very small flakes on the sand paper which I will post pictures of here in a little while.

Check it out......and not that this is always the coldest side of the car. It is the furthest away from he heat and always upon turning on the heat it takes the longest to warm up. Is this even a problem......it's just something I noticed and seemed out of the ordinary. I'm new so I don't know
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And here it's feathering fine.
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If you are expecting epoxy to sand anything like a urethane primer, forget it. I have been super impressed with the SPI epoxy, as it actually is somewhat sandable. You want to see what others are like, get some ShopLine/Omni or DuPont epoxy.. The stuff cures so hard its like trying to sand a layer of plastic. IMO, thats why the SPI epoxy is considered "sandable". It will actually give off some dust when you hit it with a DA. But its never like sanding a decent urethane primer. They have different properties to acheive different things.. Epoxy gives that great base layer sealing the metal from the atomoshere, and makes a great top layer prior to putting down paint.. But for the most part what you put down is what you get.. You don't normally use it to try to to fill sand scratches. You don't normally use it to try to get imperfections out. Get the metal work right, put the epoxy down, then go to urethane primers that sand easy and really smooth.. Then you can use the epoxy thinned as a sealer if you want a nice smooth uniform surface to put the paint on so you dont get color bleeding and so forth. Scary part of using epoxy as your sealer is if you run it, orange peel it, etc, you are left with a headache since you go right from epoxy sealer to paint in a short period of time..
 
With a good cure epoxy sands great, when it's fresh/uncured you can expect it to clump up on the sandpaper and not feather well. Using solvent based wax and grease remover instead of water works a little better for sanding out minor imperfections in fresh epoxy but you wouldn't want to sand a whole car out like that.
 
Is that fearing well enough or is there a problem. I'm wanting to paint it tomorrow
I'm wet sanding it with 600 and it's not messing up the paper at all. I just want to make sure
 
If you're sanding it ok with 600 it will be fine. Did you spot prime that filler area?
 
I'm sanding it with 600 and I spot primed it wit 2 coats. Any ideas on how to hang the 20 plastic part I have on this rack

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I was working on it tonight. But if anyone has ideas let me know. They are way to close together to paint them and get all the areas without running the paint and clear
 
Epoxy adhesion and good sanding comes with cure, sounds like just got onit to soon.
Chances are if you check the worse spot this morning it will feather just fine.
 
you have 20 plastic parts to hang and shoot? small parts? With a lot of small parts if they can be held by wire in one hand and sprayed with the other and if space is limited I find it's easier to spray them and then hang them in an area to cure. I hang parts from the ceiling all the time, you may need to run a clothesline or attach a hanging bracket to the ceiling. Once you get more experience with the epoxy it will be easy for you to judge the cure and how well it sands, spray a few test panels the next time you shoot epoxy and test sand them as they cure days, week, weeks later.
 
I sprayed some epoxy mixed as a sealer 6 days ago........I want to spray more sealer over it. I know reduced epoxy cures faster. Is this safe to spray over.

At 6 days and 17 hours I'll be painting. Should I just scuff the epoxy with a red pad in the places that won't be seen. The rest of the car will be sanded with 600? I'm always pushing this epoxy to the last day

I hung them from the ceiling with wire like you said. Hung a piece of PVC with coat hangers..".......then coiled coat hangers from the pvc to hang the parts. This allowed them to slide back and forth for adjustability. And the coil part made me able to raise and lower them adjustability. So I didn't have to measure and drill holes hoping they were in the right place. I ran some dowel rod across them to lock everything in with zip ties.
 
When in doubt scuff it up. At 6 days I would scuff or sand it.
 
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