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Old 04-10-2006, 11:26 AM
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how to apply dupont 2330S plastic adhesive promoter?

Hi there guys,

I was planning on repainting new factory bumper for my daily driver gas saver '02 Civic. I wanted to do it right so I didnt have any paint peeling since paint doesnt stick to plastic very well. So I purchased some good stuff. Dupont 2330S adhesive promotor and also the sealer that goes over it. The 2330S is greenish color just like some factory promotor I have seen while sanding down my toyota bumper. Execept on my toyota bumper it looks like it was sprayed on evenly like a base coat. The instructions says apply one medium coat. Is a medium coat suppose to look slightly foggy? I sprayed it and it was such a thin material that if I tried to make it look like a base coat it would run. If I didnt put enough it would like dry and foggy. I am using a devilbliss GFG670 with a 1.4 tip. Thanks

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Old 04-10-2006, 11:54 AM
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The adhesion promoter I use is nexa autocolor it's like water. I use a pump sprayer like for preclean and wax and grease remover. It seems to spray well and lay a light coat which seems to soak in before it runs. You don't need much just lay a coat that covers.
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Old 04-10-2006, 12:04 PM
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Yeah I scrubbed the crap out of my bumper. Nothing beats dish soap and a scotch pad. And went over it with some grease and wax remover as well. So I dont need to lay it down like a base coat? I could see through it and see the color of the plastic.
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Old 04-10-2006, 12:12 PM
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No you don't need to lay it on like basecoat just a quick pass with a pump sprayer make sure it covers well but not heavy it is very transparent once it dries you almost can't see it. You also should use plastic precleaner not wax and grease remover it leaves a residue which doesn't bond well. If you don't have any I'm sure rubbing alcohol would work fine as I'm pretty sure that is all plastic preclean is just at an inflated price.
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Old 04-10-2006, 12:16 PM
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Thanks for the tip..you're right because I did get 3 fish eyes when laying it down. So Im getting ready to paint my other car. Its primered right now and his been guide coated and wet sanded level. Is it not a good idea to go over it with the cleaner VOC cleaner I have? I used it before for painting and or using sealer and it has not fish eyed. But maybe sealer and paint isn't as watery as the adhesive promoter. What do you suggest? Thanks
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Old 04-10-2006, 12:24 PM
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Also don't just spray basecoat after the adhesion promoter you should use an etch primer or epoxy which ever dupont reccomends on the bare spots first then a sealer on entire surface or high build primer if you have repairs. I'm not sure of Dupont product these days I haven't used them since '99 you should talk with paint rep he will tell you the recommended products the order which they apply and flash times.
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Old 04-10-2006, 12:36 PM
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As for the precleaners. I use wax and grease remover for the entire repair area before I start any work. After the body work is done I will agian wax and grease because air tools spray oil. Then I use final wash precleaner right before any spray coating but the only spots that need plastic pre clean are bare plastic spots which the paint has been sanded off or peeling. It doesn't hurt to wax and grease bare plastic just make sure you wash it afterwards with plastic cleaner right before spraying adhesion promoter.
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Old 04-10-2006, 04:13 PM
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Thanks I'll go purchase some of that cleaner and see how it works out.
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Old 04-10-2006, 05:19 PM
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Dupont recommends that after you spray the adhesion promotor you come back with the dupont flexible sealer which I also have. Then top coat it with a base then the clear.

You havent used Dupont products in a while..whats your opinion on them? So far all the stuff I used seemed to work pretty good. Are they up there in the ranks of quality materials?


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Originally Posted by lincoln9
Also don't just spray basecoat after the adhesion promoter you should use an etch primer or epoxy which ever dupont reccomends on the bare spots first then a sealer on entire surface or high build primer if you have repairs. I'm not sure of Dupont product these days I haven't used them since '99 you should talk with paint rep he will tell you the recommended products the order which they apply and flash times.
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Old 04-10-2006, 05:37 PM
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Dupont is certainly very good don't be scared to use their stuff. I completely forgot to mention flex agents.
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Old 04-10-2006, 06:23 PM
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You should add flex agent to the clear also ask Dupont about the additives. If you have feather edged the paint on the plastic you my want to do 1 or 2 coats 2k primer after the sealer so that they don't show up.
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Old 04-10-2006, 08:11 PM
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Duponts tech sheets on the clear says not to add any clear coat flex additives. According to the paint shop their new higher quality chromabase line paint is very flexible. As long as it has something good to stick to it should be able to flex with it.
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