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Antique Tractor Paint and Bodywork

Re: Omni products questions

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Rod (NH)

04-05-2014 18:19:52
184.61.126.67



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Some years ago (2006) I did a cost comparison of PPG's "economy grade" OMNI MTK single stage urethane and PPG's "premium grade" Concept DCC single stage urethane. The mix ratios of the two products are different as are the costs and the costs of all additives. I did the comparison on an RTS (ready-to-spray) basis. One quart of MTK RTS was $19.82 and one quart of DCC RTS was $59.93. I assumed that any leftover reducer was not wasted and could be utilized at other times. That makes DCC about three times as expensive as MTK. My past experience using both MTK and DCC is that DCC is quite obviously a higher solids product and covers better than the MTK. While I use three coats of MTK, I only need two coats with DCC. Incorporating the coverage difference into the RTS cost difference, concludes that topcoating any object that requires one quart of RTS material per coat will cost $120 using DCC and $60 using MTK. By that analysis, the DCC costs twice as much to cover the same object as the MTK.

My personal opinion is that for the DIY that only paints on an occasional basis and does not count his time as money, then the DCC is not worth twice the cost, although one could weigh the value of the extra risk of screwing something up during an additional coat. On the other hand, for someone whose time is money and making a profit is the incentive, then the premium DCC might well be worth the extra cost. Plus if one is experienced enough to be able to get adequate coverage in a single coat of DCC, then the cost is awash and the decision is an easy one to go with the premium product.

I think that even B would agree that the PPG's "economy" epoxy primer (OMNI MP-170) is just as good at a far less cost than PPG's "premium" epoxy primer (DPLF). I used to use the premium DP (before they took the lead out and called it DPLF) and always found it to be an outstanding product. Quite some time ago however, I moved to MP-170 because of cost. After using that for a number of years, I see no reason at all to go back to DLPF, at least for a DIY doing his own work where there are no warranty issues to consider.

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B-maniac

04-05-2014 18:48:05
75.133.246.29



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 Re: Omni products questions in reply to Rod (NH), 04-05-2014 18:19:52  
I actually like the MP 170 better than the PPG DPLF. Seems a little heavier bodied and goes on better. You are right in that less coats equal less opportunity for flaws/cantamination but does take more practice than most on here have had. Over at Morbark Inc. where I retired from , we used a 2K urethane solid orange single stage and it was designed specifically for our company and one of the specs was it had to have a dry film of 2.5-3 mils and go on in ONE coat. It did just that.We paid $30 per sprayable gal for it(no misprint..$30!) and it set up overnight so you could walk on the machine the next day.(which the hyd. hosing crew did) We used Grayco electrostatic guns and supply came from proportioners/mixers that mixed the 2 parts en-route from 55 gal drums. No pot life or mixing to worry about.Just open flush valves at end of the day and flush lines/guns. Most machines took from 20-30 gal. My one bad experience with Omni single stage urethane came with the yellow on my JD B rear cast wheel centers. Over MP 170, took 6 coats and that's without much thinner at all. Very transparent.Yes, painting for a living and especially self employed, one does tend to put a premium on the time element.

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newgenjdcollector

04-06-2014 06:10:59
162.252.146.175



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 Re: Omni products questions in reply to B-maniac, 04-05-2014 18:48:05  
Anyone looking for a quality epoxy primer that in my opinion works a lot better than DP and costs considerably less should look into a complany called Southern Polyurethanes.
www.southernpolyurethanes.com It is completely compatible with all of the ppg primer and paint products I have used and still use.
For me, the PPG DP had a too much wrinkle in it, which made the paint give off the same effect. The Southern Pol. Epoxy goes on smooth and lays flat with no wrinkle. That and the cost is just absurd. Since swithing, I have not gone back to DP or Omni. I also started using their Clear. Cost is nearly half of PPG and better quality IMO. It flows out extremely well and doesn't get cloudy between coats like the 3000 we were using. Most of the parts I clear, I don't even buff because it lays that well without imperfectons. Another thing I like is the epoxy and clear mix 1:1 which is so much simpler when you have other things on your mind on paint day. If anyone wants to compare costs, I can dig up my price sheet and list what I use.
This post was edited by newgenjdcollector at 06:13:50 04/06/14 2 times.

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