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Omni epoxy primer any good?
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Matthew Tolbert
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PostPosted: Thu Aug 01, 2019 9:25 am    Post subject: Omni epoxy primer any good? Reply with quote

Iíve searched and found mixed reviews on the Omni line of epoxy primers. Most of the threads are a few years old so Iím looking for more recent experiences if possible. I am wanting to start stripping my car to bare metal and apply some sort of epoxy primer as a base to protect the metal while Iím doing any repairs. Is the more expensive DP line worth getting at twice the price?

I also want to mimic the factories method of dark grey, then light grey/white (itís hard to tell which color it is) then color. The paint store I went to opened a can of the Omni grey and it was a little lighter than the factory dark grey primer. I thought about getting a can of black also to mix in to darken it up a bit. Has anyone tried this before? Do you have a ďmix ratioĒ you think is a close match? Iíve read the tech sheets and it says it CAN NOT be tinted but can be mixed. Also If you have any tips or tricks you can share that might help would be great.
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56reddy
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PostPosted: Thu Aug 01, 2019 11:54 am    Post subject: Re: Omni epoxy primer any good? Reply with quote

Omni epoxy primer is garbage. Iíve found that Southern Polyurethane incorporated (SPI) makes a great epoxy primer for $200 for two sprayable gallons. I base every paint job on this epoxy. You can get it online shipped to you. Also they are located in GA.
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Matthew Tolbert
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PostPosted: Thu Aug 01, 2019 12:19 pm    Post subject: Re: Omni epoxy primer any good? Reply with quote

Thanks for the information. Just curious what you feel is wrong with it? Iíll look into SPI
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Matthew Tolbert
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56reddy
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PostPosted: Thu Aug 01, 2019 1:24 pm    Post subject: Re: Omni epoxy primer any good? Reply with quote

Omni epoxy is very watery and doesnít cover near as well as the SPI epoxy. If you decide to go with SPI get the tech book and it explains how to use the SPI system.
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Matthew Tolbert
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PostPosted: Thu Aug 01, 2019 2:04 pm    Post subject: Re: Omni epoxy primer any good? Reply with quote

Good info. You have any insight to my other questions regarding trying to match the factories process?
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Igpoe
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PostPosted: Mon Sep 16, 2019 1:02 pm    Post subject: Re: Omni epoxy primer any good? Reply with quote

Use a complete system is my recommendation.
If you like ppg paint then use their primers and sealers underneath so that if problems arise the factory reps can understand and help with a solution. If you
Mix products from suppliers, poor results will follow.
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Kiper
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PostPosted: Tue Sep 17, 2019 1:06 pm    Post subject: Re: Omni epoxy primer any good? Reply with quote

I have used several different ones. Unfortunately in Southern California we have strict laws on what we can and cannot use. I use to use PPG's "DP" series epoxy for all of my bare metal cars. Now I just use a quality DTM or " Direct to Metal primer for all the bodywork. The one I use the most of is made by Vintage. It is a polyester hybrid that works great on bare metal and body filler.
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Flat4BRM
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PostPosted: Mon Sep 30, 2019 11:18 am    Post subject: Re: Omni epoxy primer any good? Reply with quote

Omni primer user here...

56reddy, not sure what problems you've ran into that makes you think Omni is "too watery", but I've personally shot gallons of the stuff with no issues. Guess it's all a personal preference. I also used to shoot PPG's "DP" line (DP40 Gray-Green was my favorite, but the DP401LF stuff WAS TERRIBLE) before it was discontinued, and the Omni stuff seems to do the job decently. It can be shot as a sealer (2:1:2 base/ hardener/ reducer) or a filler primer (2:1:1) which is a nice detail, if you're not looking to buy separate materials. I'm sure others have had bad experiences with Omni... but I'd figure I'd support it here Smile

Regardless of what you shoot, I agree that you should stick with one system / manufacturer for all your substrates & final paint. Less chances of having a substandard paint job....
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Evil_Fiz
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PostPosted: Mon Sep 30, 2019 1:54 pm    Post subject: Re: Omni epoxy primer any good? Reply with quote

I have also heard many good things about SPI. I had a conversation with their tech support personnel and they were extremely helpful.

Two separate options have been expressed in this thread. One is the use of SPI (or third party EPOXY/DTM primer) under every paint job and the other is to go with a complete product system. Option two is self explanatory but option one prompts me to ask the following questions:

@56reddy:
- What product line do you use to complement the SPI base?
- Can you share your process for the less experienced among us?

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56reddy
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PostPosted: Mon Sep 30, 2019 3:11 pm    Post subject: Re: Omni epoxy primer any good? Reply with quote

Evil_Fiz wrote:


@56reddy:
- What product line do you use to complement the SPI base?
- Can you share your process for the less experienced among us?

-----
Emil


I use SPI product for everything except my base color. Depending on the color, I've used Omni, Limco, and PPG for base coat.

So my process goes.......
SPI epoxy
SPI 2k primer
SPI epoxy (1:1 + 10% reducer) as a sealer
Above mentioned Base color
SPI 20/20 Euro Clear
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