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Old 05-11-2011, 10:59 AM
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Using Poly Primer instead of Poly Putty in between Epoxy and Eurethane primer

Just wondering if I can use Poly primer as a build primer in between my Epxoy and Eurethane primers?
I noticed that I sloppily sanded down the old paint thus causing a some very low spots that I eventually have to use polyester filler. I was wondering if I can use Polyesetr primer instead of the filler by hand? or with there be a bad reaction with with the Euretane I will use on top for blocking?

and wondering why this isnt uses more often instead of manually mixing putty and hand applying it? Doesnt the cost come out about the same and it jsut seems like I wouldnt be wasting as much polyester. ??
or Maybe Im just not that good at applying putty??

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Old 05-11-2011, 11:28 AM
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To some extent the poly spray will work, but it really doesn't do a good job of raising lows if they can be either felt or seen. This is what the Brookville trunk lid to my car looked like:

After sanding to bare metal



After epoxy primer then Rage Gold filler



Then it got several coats of poly fill spray. The avatar is what the entire car looks like - and I do need to take a separate photo of the finished trunk lid.

Do your filler, maybe a little Icing, poly fill then 2K (which really isn't necessary after the poly)

Dave W
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Old 05-11-2011, 08:23 PM
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Geeze Dave, I though my glass 34 was tough.

Vince
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Old 05-11-2011, 08:41 PM
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Quote:
Originally Posted by 302 Z28
Geeze Dave, I though my glass 34 was tough.

Vince
Vince - that's the way Brookville makes 'em. My Rootleib hood, Albrecht rear fenders and Wescott fronts needed zero to minimal work(everything but B-ville). You at least had one of Kyle's best to work with

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Old 09-08-2011, 12:40 PM
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Dave, Did you poly spray over the areas of metal, or did you epoxy it first? Was not sure if you could spray poly on bare metal?

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Tony B
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Old 09-08-2011, 12:53 PM
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Quote:
Originally Posted by abarli65
Dave, Did you poly spray over the areas of metal, or did you epoxy it first? Was not sure if you could spray poly on bare metal?

Thanks,
Tony B
Tony,
They were epoxied (SPI) then filler used (Rage). Because I had a few very small depressed areas found with guide coating, poly'd after another epoxy layer to cover sanded bare spots. Forgot the poly brand, but it was a known name.

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Old 09-09-2011, 06:28 AM
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Featherfill by Evercoat?????
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Old 09-09-2011, 06:54 AM
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Originally Posted by deadbodyman
Featherfill by Evercoat?????
Yep, you got it. A case of CRS/senior moment or both
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Old 09-09-2011, 07:25 AM
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I'm one of the guys that uses the poly putty over filler.For me its not only faster its waaaaay cheaper......then I use a 2k primer...
With the spray poly you have to mask off EVERYTHING and bag the car (if its a repair) then wait for it to dry.....then hit any low spots with putty anyway or retape and respray....for me the putty is the only way to go....it dries fast and you can sand right away ,one or two skim coats is usually all it takes..
By the time you mix the poly spray get it in the gun and mask the car Ill be done and ready for my 2k primer....
the feather fill has it uses though and for a lot of guys it makes things a lot easier,but you got to be careful not to leave a lot of build up around places like door edges you can get some giagantic chips if you dont sand ALL your edges down good...
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Old 09-09-2011, 08:00 AM
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I 'feel' that I have read enough about poly to have a good understanding of the pros and cons of using it... I am 3 years into my 65 mustang (first restoration, and loving every moment). I have been out of the garage due to my son being born, and the Texas heat has been not kind to doing body filler work.
I have spoken with BarryK and he sold me on using his 2k primer to get my panels razor straight after doing all the work with filler where needed.

The body was taken down to bare metal with 80. Sprayed with PPG Omni epoxy. Been working with body filler ever since... The small areas have been easy, but the large areas like the deck lid, which is full of undulations, has been a bear. I am using rage extreme and cannot seem to get it spread well over a large area before it firms up. Then I sand and sand and break through in areas, and am high in other areas... A lot of this is learning, I know, but I was starting to think of using some poly to get a full smooth coverage on which to sand. Just seems more logical in my head. Was thinking of using it on my deck lid, roof, and fiberglass hood.

All in all the plan is:
bare metal, epoxy, body filler, SPI epoxy, SPI 2k, SPI reduced epoxy, prospray, SPI Clear.

If I do some of the poly on the panels I mention above, I assume it would go between the body filler and SPI epoxy.

And just one add... I have been reading this forum for a few years now... Lots of great info, and so many guys on here that truly know this business and eager to share. So helpful to guys like me that just want to build something cool to be the envy of the neighbors you like, and piss off the ones you don't. http://www.hotrodders.com/forum/newr...e=1&p=1467131#
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Old 09-09-2011, 08:10 AM
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Bare steel > epoxy > filler > epoxy > poly> 2K if you want > BC/CC. Just make sure that you have epoxy on bare steel. And as DBM says, even some Icing might be desirable. I probably have that on the trunk lid I show above

For sanding, a really long board 18 to 36 inches will often 'fix' waves that keep cropping up.

Barry's recommendations are always right on but everyone has a different way and they probably aren't wrong either

Dave W
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Old 09-09-2011, 08:48 AM
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bare steel , epoxy , filler, epoxy, epoxy, epoxy, epoxy.......
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Old 09-09-2011, 10:51 AM
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Dave, I do use the metal glaze over my filler. I took a auto paint/body class at the community college in order to have access to their paint booth... Instructor taught me that without the glaze over the filler, the epoxy kind of gets sucked into the filler.

Shine,
LOL... was wondering if you would see this. I've been reading long enough to know your thoughts... :-) if only we could get a candy apple red epoxy and a clear coat epoxy we would be all set! Get BarryK on that!

I have seen some videos of guys using a huge gob of filler and spreading it really nice and thin over an entire panel... what are they using?? my rage extreme does not seem to give me the time to mix, let alone spread that much filler onto a panel?

I am currently at the end of my gallon of rage extreme... you would think I was eating the stuff. Should I get another gallon of extreme, or switch to another product?


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Old 09-09-2011, 11:07 AM
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some pics of my work... some areas went quick, others... not so much.

This was my very first spread of filler...



shaping out small areas like this don't seem to be an issue with me



but the large areas and complex curves are a huge learning curve


after all that filler and sanding, it still felt very wavy...
so I concentrated my efforts to one side... it feels good, and looks straight from a primer perspective


I am currently here... trying to get the right side leveled out.


oh yeah, and I have ADD when it comes to working on one spot... I get bored with it, so I like to move around a lot. I know I should work one fender till complete, but can't seem to control myself.
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Old 09-09-2011, 11:44 AM
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always lay your filler in a square. if you block it until you see shape your too low.
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