Painting a blue bonnet/bumper silver .
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Thanks, I must admit I am self taught. The first time I used the dupount etch primer… a customer brought me a gallon and wanted his wrecker bed painted. It was made of checkerplate and the existing paint was badly cracked, and rusted. I scraped and wirebrushed until my hands were sore and my brushes worn out. I sprayed that etch for the first time over that crap and it laid out like glass. I read on the can that it did not need to be sanded because it had a molocule that stayed receptive to the next topcoat. I jumped for joy, not having to sand that damn checkerplate! I sprayed over it with an industrial polyurethane white and it came out great. Yall’ make real good points about build film thickness, rock chip resistance, filling sand scratches. You got me convinced and I am going to start sealing under my base. BEN does the Duopount 9500 epoxy lay flat? I see it is wet on wet so there is no sanding before topcoat. I’m glad my link to worked for ‘yall. Bill This is why I joined this site.. to learn… share THANKS!
Ryan’s TDS above is an 04/11 revision. Previous TDS from 04/02 does not state 491-17 must be followed by primer, and topcoats can be applied directly over it. Reported failures may have prompted the revison and/or the lab determined performance was compromised by not following etch with primer. http://metropaint.com/pdfs/491-17.pdf I have not used etch since the 80’s when Variprime was popular.
Looky there.. It says you can topcoat directly over the etch prime. QUOTED from the TDS….
DRYING TIME:
Allow Primer to tack (15 to 30 minutes)
before applying Primer-Surfacer or topcoat. OK wait NOW I get it…. It was ok then, not now. Duopount failed to send me an update..lol[quote=”billgaino” post=28138]Looky there.. It says you can topcoat directly over the etch prime. QUOTED from the TDS….
DRYING TIME:
Allow Primer to tack (15 to 30 minutes)
before applying Primer-Surfacer or topcoat.[/quote]Bill, that was revised in 2011 for a reason, that’s why it’s important to find if any updates have been released. Read the date at the bottom of the pages. Just because a company stated something on a TDS 10 years ago does not mean it applies today. Except for ability and technique, many problems can be eliminated by reading the latest TDS for every product you use. Every TDS is available on line at every company’s website.
Thanks ScottB, I never tried it base clear…only enamel and single stage urethane. In future I’ll be using a lot more 2k sealer. You know a lot of jobs are price conscience. Under the hood of my car…I don’t have to worry about rock chips. A customer has a peeling white hood on his work van. I could strip it, lay the etch and paint it back for $300 and MAKE money. BEN, Nobody in my area carries the Doupont 2500 series…can you believe it?
[quote=”billgaino” post=28140]Thanks ScottB, I never tried it base clear…only enamel and single stage urethane. In future I’ll be using a lot more 2k sealer. You know a lot of jobs are price conscience. Under the hood of my car…I don’t have to worry about rock chips. A customer has a peeling white hood on his work van. I could strip it, lay the etch and paint it back for $300 and MAKE money. BEN, Nobody in my area carries the Doupont 2500 series…can you believe it?[/quote]
To answer your earlier question, yes, this epoxy lays down very flat. The epoxy is not VOC compliant (here is Canada) so we can no longer get it up here. Since you are using the products you have mentioned earlier, I assume your area has no VOC restrictions. I find it odd that your DuPont supplier(s) cannot get you this sealer. When it was available up here, it was very popular.
for the guys out there who use epoxy as a sealer; do u notice it shrink more than urethane sealer after time? one of the main reasons i dont use it as a sealer anymore is shrinkage.
Not so much shrinkage but you will get a touch of dieback if you don’t follow proper flash time.For wet on wet situations on jambs or sandblasted metal it works very well.I prefer a 2k urethane sealer for everthing else.
yes i actually preffered it more than urethane but it was something like shrinkage or dieback that made me stop using it. it wasnt really noticable but a trained eye could pick it up.
[quote=”Ben” post=28141][quote=”billgaino” post=28140]Thanks ScottB, I never tried it base clear…only enamel and single stage urethane. In future I’ll be using a lot more 2k sealer. You know a lot of jobs are price conscience. Under the hood of my car…I don’t have to worry about rock chips. A customer has a peeling white hood on his work van. I could strip it, lay the etch and paint it back for $300 and MAKE money. BEN, Nobody in my area carries the Doupont 2500 series…can you believe it?[/quote]
To answer your earlier question, yes, this epoxy lays down very flat. The epoxy is not VOC compliant (here is Canada) so we can no longer get it up here. Since you are using the products you have mentioned earlier, I assume your area has no VOC restrictions. I find it odd that your DuPont supplier(s) cannot get you this sealer. When it was available up here, it was very popular.[/quote]. Right Ben, no voc restrictions here. I,m sure I can find it online. Just my local suppliers don,t carry it. I,m going to ask around sme local shops and see what they use for sealer, I can hardly wait to get a job in and try my MAtrix Accushade 2k!
[quote=”MoCoke” post=28142]for the guys out there who use epoxy as a sealer; do u notice it shrink more than urethane sealer after time? one of the main reasons i dont use it as a sealer anymore is shrinkage.[/quote]
I never noticed issues with die back or shrinkage. Only thing was the flash time…15 minutes for 1 coat, 30 for 2 coats. In cooler conditions, much longer. I think the DuPont epoxy I referred to may be slightly different than some of the older epoxies (no induction time needed).
Bill, In regarding your public message about on line tech sheets. You want to go to the company’s website to get them and not just Google the product. If you Google it typing certain text, you may end up with the outdated TDS I posted earlier as an example. Once it’s on the net it’s there forever.
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