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Old 10-24-2008, 12:19 PM
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Five Star Primer ?

I went to the local autobody store and asked for an epoxt primer and he gave me "5 Star Extreme". I've been reading up on it and it seems to be a hybrid epoxy/acrylic. Has anybody else used this, will it stand up as well as a straight epoxy primer?

http://www.autobodybrands.com/primers/5425_x2k.html

I have some sections that I used POR15 and POR15 tie coat primer and I'm wondering if I can spray over that as well so everything in a uniform coat of epoxy.

Any input???


Thanks,
Sean

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Old 10-27-2008, 07:12 AM
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I am not a pro, however I used this same product and it turned out pretty well I think. I had a friend spray the color and clear and the final product turned out well.

One other thing: It sands nicely. I did a LOT of blocking, and it sanded out real nice.

See the picture below
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Old 10-27-2008, 04:53 PM
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Good to hear, I just sprayed a coat on the other day before I started applying my Lizard Skin coatings. Went on real nice, hoping this all holds on tight . That looks real nice!!

Sean
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Last edited by sgo70; 10-27-2008 at 05:12 PM.
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Old 10-27-2008, 06:37 PM
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I cant comment on its long term endurance but I can say this.

If its the 2k "Extreme" DTM Primer/Surfacer/Sealer ****, that stuff sands absoutley terrible. I find it to be very soft, and clogs up the paper very quickly. If you happen to catch and edge, or are not careful you will gouge into your just sanded finish. To me, its fine for small parts. But I would not want to sand an entire car coated in the stuff....way to much paper and time.
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Old 10-28-2008, 01:32 PM
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Quote:
Originally Posted by BMM
I cant comment on its long term endurance but I can say this.

If its the 2k "Extreme" DTM Primer/Surfacer/Sealer ****, that stuff sands absoutley terrible. I find it to be very soft, and clogs up the paper very quickly. If you happen to catch and edge, or are not careful you will gouge into your just sanded finish. To me, its fine for small parts. But I would not want to sand an entire car coated in the stuff....way to much paper and time.
Interesting.....That was not my experience at all. It sprayed well and sanded easily without clogging my paper. I probably did 6 or 7 rounds of block sanding in all, as well as a lot of bodywork (filler, mostly). Maybe it is just because I don't have a lot to compare it to. As I said, I'm strictly an amateur....
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Old 10-28-2008, 02:12 PM
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I have never used that product, but I do know that epoxy's in general are a pain to sand. Epoxy is good as a sealer and direct to metal. But I prefer to use a 2K urethane primer for bodywork/blocking. There are a few epoxy's out there now that claim to be sandable but I have never tried them. I"m assuming thats what this 5 star product is. Now that I think about it I used some SEM Metal Lock primer that was Direct to metal. and it may have been an epoxy, it sanded ok if I remember right.
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Old 10-28-2008, 07:09 PM
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Yea it's an epoxy/acrylic hybrid that says it's easy to sand, I don't know yet as all I had to do was scuff it. I'll keep updating as I get into blocking it next week.

Sean
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Old 10-28-2008, 09:09 PM
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Quote:
Originally Posted by sgo70
will it stand up as well as a straight epoxy primer?

http://www.autobodybrands.com/primers/5425_x2k.html



Any input???


Thanks,
Sean

It won't be as durable as a true epoxy primer and solvent resistance is not as good but most of these hybrids trade off those qualities for sandability. If you're looking for a true epoxy primer that sands well SPI is the best I have found. Many are using it from start to finish now.
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Old 05-11-2013, 06:54 PM
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Quote:
Originally Posted by BMM View Post
I cant comment on its long term endurance but I can say this.

If its the 2k "Extreme" DTM Primer/Surfacer/Sealer ****, that stuff sands absoutley terrible. I find it to be very soft, and clogs up the paper very quickly. If you happen to catch and edge, or are not careful you will gouge into your just sanded finish. To me, its fine for small parts. But I would not want to sand an entire car coated in the stuff....way to much paper and time.
I know that this is an old thread, but it came up in a search, and I thought I owed to others searching to add my 2 cents. I'm not a pro, but have painted my share of cars. Like BMM said, this stuff is JUNK! I made the mistake of spraying my whole project with this stuff. Dry sanding is impossible, it just wads up and clogs the paper producing gouges, wet sanding produces small granules that leave scratches. I used 5 star Extreme 5451 which isn't described as a "hybrid" but it sure does't sand like any 2k primer I ever used, it's more like sanding epoxy. I've mixed it with and without reducer with the same poor results. My suggestion, STAY AWAY!
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Old 05-12-2013, 07:31 AM
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SPI Epoxy sands awesome and adheres great. I see no reason to not use it instead of ANY other dtm primer or treatment.

I must add that I do not use any por type products and dont believe in painting over rust, so I have no idea how SPI Epoxy would perform over such substrates.
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Old 05-14-2013, 05:47 AM
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Quote:
Originally Posted by Dork View Post
I have never used that product, but I do know that epoxy's in general are a pain to sand. Epoxy is good as a sealer and direct to metal. But I prefer to use a 2K urethane primer for bodywork/blocking. There are a few epoxy's out there now that claim to be sandable but I have never tried them. I"m assuming thats what this 5 star product is. Now that I think about it I used some SEM Metal Lock primer that was Direct to metal. and it may have been an epoxy, it sanded ok if I remember right.
Thats what I thought (epoxies are hard to sand) until I found SPI .I 'm not using ANY 2k (urathane primer) because SPI epoxy also builds along with exellent sanding....
When an epoxy balls up and gums the paper its most likely not completely cured OR it wasnt properly mixed to the right ratio....I've had epoxy take a week to cure sometimesbut it was really piled on there
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Old 05-14-2013, 08:39 AM
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After having this trouble with it, I thought it must be an epoxy hybrid, and SOME five star xtreme high build primer is a hybrid. Xtreme 5425 IS a hybrid, it says so in the description, but what I used, Xtreme 5451 says nothing about being a hybrid. All I know is, I used an Eastwood epoxy on this car and it is not that much worse to sand than this 5 star 2k, I've never used a 2k this bad to sand. I'm just going to sand it down as much as possible, and reprime with another primer. Probably Sherwin williams, since that's the BC/C I'll be using. Anybody use Sherwin Williams primer?
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Old 05-14-2013, 09:05 AM
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Primer........

I sprayed my 28 Ford Roadster pickup with SPI epoxy primer,I LOVE IT,the neat thing is,that it (SPI)has a good shine.so,very easy to sand and see when its smooth and ready for the topcoat of paint...
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