Dupli-color primers

[AMT68]

I did a search and didn't find an answer (I'm still relatively new here) on whether it's safe to use a Dupli-color primer (most likely sandable) on styrene models. I normally use Tamiya primers under hobby color coats with very good success. When I've used Tamiya primers under the Dupli-color (Perfect Match Acrylic Lacquer) I sometimes getting chipping in the top coats. Now I'm not sure if the culprit is in fact the Tamiya or possibly something I'm doing wrong that causes the chipping. Thanks. 

[Ace-Garageguy]

CLICK HERE:         https://www.google.com/search?source=hp&ei=rvrbX6qfDMLt5gLM3pXQBQ&q=modelcarsmag+duplicolor+primer&oq=modelcarsmag+duplicolor+primer&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKABMgUIIRCrAjIFCCEQqwIyBQghEKsCOhEILhCxAxCDARDHARCjAhCTAjoCCAA6CAgAELEDEIMBOgUIABCxAzoLCC4QsQMQxwEQowI6CAguELEDEIMBOgIILjoFCC4QsQM6CAguEMcBEK8BOgUIABDJAzoKCC4QxwEQrwEQCjoECAAQCjoECAAQHjoGCAAQChAeOgsIABDJAxAWEAoQHjoICAAQFhAKEB46BggAEBYQHjoHCCEQChCgAVCqDFjngQFgo4YBaABwAHgAgAGRAogBzhWSAQYyNC41LjGYAQCgAQGqAQdnd3Mtd2l6&sclient=psy-ab&ved=0ahUKEwiqrtLupdbtAhXCtlkKHUxvBVoQ4dUDCAk&uact=5

[AMT68]

Okay, thanks for the link Bill. Much appreciated. 

[StevenGuthmiller]

I use Duplicolor primers, either sandable, or primer/sealer, almost exclusively on my projects.

It works very well, but I will warn you of a couple of facts that you might like to know.

 

Duplicolor primers are "hotter" than hobby primers and need to be treated accordingly.

A shot of a hobby primer to start, followed by several light coats of Duplicolor handles the issue very well for me.

Also note that Duplicolor primers are quite thin and do not cover as well as some hobby primers, but it dries so thin that several coats will not hide any detail.

I use as many as 5 coats of Duplicolor primer on my builds with no hide whatsoever, and paint adhesion is very good.

With normal handling, you shouldn't have any chipping issues.

 

 

 

 

Steve

[Tom Geiger]

Short answer- Yes you can use Duplicolor primer. In fact it’s all I use. Generally I use the gray, but recently picked up the white to use under light colors.

[moparfarmer]

Duplicolor primer is all I use..I've found that the large tin now says fine filler primer but is the same..It seems a darker grey but the Perfect Match primer is lighter grey..Its the best primer for all uses..Its lots less expensive too and a big can lasts quite a while..Also has the fan spray which is good..

 

[moparfarmer]

I agree on all what Steven said in his above post..He should know..His builds and paint jobs are fabulous.

[Plowboy]

I've used Dupli Color over Tamiya primer with no chipping problems. Could you post a photo of an example? 

[Bills72sj]

I used Dupli Color over Tamiya primer and was getting some minor chipping. I handled the build very carefully until it was detailed then put Future over it. It seemed to act as a sealer. No issues since.

http://www.modelcarsmag.com/forums/topic/147188-modified-for-length-amt-lowboy-trailer/

 

[AMT68]

17 hours ago, StevenGuthmiller said:

I use Duplicolor primers, either sandable, or primer/sealer, almost exclusively on my projects.

It works very well, but I will warn you of a couple of facts that you might like to know.

 

Duplicolor primers are "hotter" than hobby primers and need to be treated accordingly.

A shot of a hobby primer to start, followed by several light coats of Duplicolor handles the issue very well for me.

Also note that Duplicolor primers are quite thin and do not cover as well as some hobby primers, but it dries so thin that several coats will not hide any detail.

I use as many as 5 coats of Duplicolor primer on my builds with no hide whatsoever, and paint adhesion is very good.

With normal handling, you shouldn't have any chipping issues.

 

 

 

 

Steve

 

Thanks for the informative reply Steve. To your point a coat of hobby primer particularly Tamiya which goes on thinly under the Dupli-color primer will not have any material effect on the model's detail. While I realize the color coats of auto lacquers are "hotter" I was basically wondering if the Dupli-color primers contained solvents that were less "hot" and possibly not have an adverse effect on the plastic. It's also good to know that Dupli-color primers will require some additional coats for proper coverage. 

[AMT68]

17 hours ago, Tom Geiger said:

Short answer- Yes you can use Duplicolor primer. In fact it’s all I use. Generally I use the gray, but recently picked up the white to use under light colors.

Okay well that's interesting to know Tom that you've had success using Dupli-color primers only. 

Edited December 18, 2020 by AMT68

[AMT68]

17 hours ago, moparfarmer said:

Duplicolor primer is all I use..I've found that the large tin now says fine filler primer but is the same..It seems a darker grey but the Perfect Match primer is lighter grey..Its the best primer for all uses..Its lots less expensive too and a big can lasts quite a while..Also has the fan spray which is good..

 

So there's really no difference with the fine filler primer versus the say the primer sealer. Also interesting. 

Edited December 18, 2020 by AMT68

[AMT68]

16 hours ago, Plowboy said:

I've used Dupli Color over Tamiya primer with no chipping problems. Could you post a photo of an example? 

Thanks Roger for the reply. I actually do have a picture of a model I painted last summer. I can literally keep scraping it right down to the bare plastic with a fingernail.

 

 

[AMT68]

14 hours ago, Bills72sj said:

I used Dupli Color over Tamiya primer and was getting some minor chipping. I handled the build very carefully until it was detailed then put Future over it. It seemed to act as a sealer. No issues since.

http://www.modelcarsmag.com/forums/topic/147188-modified-for-length-amt-lowboy-trailer/

 

Well thanks Bill for the reply. I never attempted Future as a finish but I may try eventually just to see. 

[Plowboy]

1 minute ago, AMT68 said:

Thanks Roger for the reply. I actually do have a picture of a model I painted last summer. I can literally keep scraping it right down to the bare plastic with a fingernail.

 

 

If you can do that, you have an adhesion problem. Did you sand the body before primer? 

[AMT68]

3 minutes ago, Plowboy said:

If you can do that, you have an adhesion problem. Did you sand the body before primer? 

 

No I most likely didn't but then I normally don't sand bodies (just scribe and sand out inconsistencies in the plastic) and yet there isn't this problem with hobby paints. So that's why I thought there was a problem with the hobby primer under an auto lacquer. 

[Tom Geiger]

I had that same adherence and scratching issue when during the 24 Hour Build I thought I could just spray Tamiya RC colors gray over older MPC kit plastic. It came off just like your picture. I had used the same gray over primer before without issues.

Then I cleaned up and sprayed a second body with Duplicolor primer gray. I reached for the Tamiya gray and realized the primer was already the color I needed!  Then I just used Tamiya clear over it and that was just fine!

[Oldcarfan27]

27 minutes ago, AMT68 said:

 

No I most likely didn't but then I normally don't sand bodies (just scribe and sand out inconsistencies in the plastic) and yet there isn't this problem with hobby paints. So that's why I thought there was a problem with the hobby primer under an auto lacquer. 

Did you also clean the mold release off the body before you painted?

Mold release prevents paint and decals from sticking. 

[Plowboy]

21 minutes ago, AMT68 said:

 

No I most likely didn't but then I normally don't sand bodies (just scribe and sand out inconsistencies in the plastic) and yet there isn't this problem with hobby paints. So that's why I thought there was a problem with the hobby primer under an auto lacquer. 

It's possible that the Dupli Color over Tamiya primer could be the issue. I always sand the entire body before primer and paint. Primer, nor paint will stick to a surface that is too smooth. 

[AMT68]

5 minutes ago, Oldcarfan27 said:

Did you also clean the mold release off the body before you painted?

Mold release prevents paint and decals from sticking. 

Definitely Patrick. I usually wash the the entire kit (except chrome of course) in dish soap and wipe the entire model with alcohol before washing it again. 

[AMT68]

5 minutes ago, Plowboy said:

It's possible that the Dupli Color over Tamiya primer could be the issue. I always sand the entire body before primer and paint. Primer, nor paint will stick to a surface that is too smooth. 

To your point I'll make sure I sand the entire body down with probably 600 grit sandpaper prior to priming. I'll spend as much time as it takes to sand down uneven sections in the body whereas a light overall sanding wouldn't be all much of an effort. 

[AMT68]

38 minutes ago, Tom Geiger said:

I had that same adherence and scratching issue when during the 24 Hour Build I thought I could just spray Tamiya RC colors gray over older MPC kit plastic. It came off just like your picture. I had used the same gray over primer before without issues.

Was that some type of contest you had entered?

[Tom Geiger]

The 24 Hour Build is an annual event every January. Some groups get together, but majority build from their homes and participate on the Facebook page.

The event runs from noon on Saturday to noon on Sunday. Your goal is to build a credible model start to finish within the 24 hours!

It’s not a contest to finish first, it’s a personal challenge to see if you can do it. Cheating is only cheating yourself!

Participants post progress the whole time, it’s fun to post pix at 3am and have people instantly comment. It is fun and rewarding to participate. I’ve learned to build more systematically, and a bit faster.  Some years if you strategize right you finish and other years you learn what to do the next time!

https://m.facebook.com/groups/2490663337730074/?ref=bookmarks

[Plowboy]

1 hour ago, AMT68 said:

To your point I'll make sure I sand the entire body down with probably 600 grit sandpaper prior to priming. I'll spend as much time as it takes to sand down uneven sections in the body whereas a light overall sanding wouldn't be all much of an effort. 

Exactly. You will see a difference Tom. You'll also discover areas that your eyes can easily miss. I know I do about every time.

[AMT68]

1 hour ago, Tom Geiger said:

I’ve learned to build more systematically, and a bit faster.  Some years if you strategize right you finish and other years you learn what to do the next time!

Not sure I would enter the event but learning to build more systematically would provide a benefit overall.