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Author Topic: NAPA DC-540 PRIMER  (Read 1530 times)
Frank Imbriaco
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« on: April 15, 2017, 05:45:17 PM »

Thinking about saving some dough and possibly weight by no longer using a 2K urethane primer and instead trying the NAPA DC-540 .
Couple of questions :
1) Any issues with it over  Randolph low-taut nitrate dope ?
2) Likely will apply white  Dupont  Chromaseal   over it .  I've used this stuff before, but only over 2K urethane primer. Any issues with it over NAPA DC-540 ?
3) Colors will be Dupont Basecoat followed by Dupont 2K  Chroma Clear .

Thanks
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Walter Hicks
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« Reply #1 on: April 15, 2017, 06:07:44 PM »

I had some bubbling issues but not sure it is directly related to the primer. I now use 2 part auto primer. I use base coat clear coat auto paint.
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john e. holliday
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« Reply #2 on: April 15, 2017, 09:12:31 PM »

I used it over base coats of butyrate dope that had set for several weeks.   Then the automotive color was applied after sanding with 300 grit paper.  Final coat was 2 part automotive clear.  I am not a finisher so there are some rough spots to the feel.


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Tom Luciano
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« Reply #3 on: April 16, 2017, 06:08:21 AM »

I had no issue using over non taut nitrate.
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Fredvon4
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« Reply #4 on: April 16, 2017, 07:46:39 AM »

I did one plane a year back with Nitrate initial then DC540 I think too soon... 2nd day and in a hurry first coat of the primer immediately crinkled up in several small spots....grrr  on the remainder of the fuse I backed off  a few inches and sprayed very lite coat, then a few minuets later a good wet coat..... and no problems

good news is, once DC 540 was good n dry the crinkly areas sanded down just fine

I am sure I put the DC540 on too wet over not well gassed off Dope
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Frank Imbriaco
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« Reply #5 on: April 17, 2017, 10:08:15 AM »

Ok. Thanks to all. Still need to know how it reacts with  Dupont 2k sealer  followed by Dupont  base coat colors / 2k clear coat .
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john e. holliday
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« Reply #6 on: April 17, 2017, 10:35:38 AM »

If in doubt try it on sample piece of work.  I usually wait a couple of day for base coat of what ever to cure/dry/air out.   Before putting color on I usually put a seal coat of clear.  I was told one time not to put on heavy coats,  go lightly with the paint until you get the layer you want to work.
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« Reply #7 on: April 17, 2017, 03:29:05 PM »

Ok. Thanks to all. Still need to know how it reacts with  Dupont 2k sealer  followed by Dupont  base coat colors / 2k clear coat .

I used it on my last plane without any issues using the 2K sealer or any of the other chromabase colors/paints. 
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Matt Colan
Walter Hicks
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« Reply #8 on: April 17, 2017, 09:10:21 PM »

Matt did  you use basecoat auto paint for the color?
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Matthew Colan mcolan94 flycl756355
« Reply #9 on: April 18, 2017, 03:13:44 PM »

Matt did  you use basecoat auto paint for the color?

I used the 2K sealer that Frank was asking about on my last plane.  It's an automotive sealcoat that I used as my basecoat on the last two airplanes.  the Dupont Chromabase went over the sealer without issue
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Matt Colan
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« Reply #10 on: April 19, 2017, 07:46:49 PM »

Has anyone used DC-540 as a filler/primer for a dope finish? I am using it for the first time and so far have been impressed. Not to the final color/clear stage of the finish yet though. Cool
« Last Edit: April 20, 2017, 08:38:35 AM by Balsa Butcher » Logged

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« Reply #11 on: April 20, 2017, 03:39:10 PM »

Yes, quite a few of us have used it  with dope with good results.

Tom
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« Reply #12 on: April 20, 2017, 06:40:32 PM »

Great! and thanks. That is the answer I was hoping for.  Cool
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Frank Imbriaco
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« Reply #13 on: May 30, 2017, 05:17:47 PM »

Just ordered a half dozen cans.  I see that it is a Dupli-Color Product
 Are guys re-coating  right after it flashes off or waiting hours or longer for full cure and  then scuffing each coat in between ?
Thanks
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Frank Imbriaco
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« Reply #14 on: May 30, 2017, 05:28:18 PM »

Just read up on product specs... and there it sez that it is a Sherwin-Williams product.
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Sean McEntee
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« Reply #15 on: May 30, 2017, 05:47:13 PM »

I used it on my current build.  Looking pretty good so far.  Ive been spraying, letting it dry for about 20 minutes, sand it off and dope on top of it with no issues.

Has anyone messed with the DC-541?  Its a rust-colored primer of the same brand
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RknRusty
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« Reply #16 on: May 30, 2017, 08:04:54 PM »

I used it on my current build.  Looking pretty good so far.  Ive been spraying, letting it dry for about 20 minutes, sand it off and dope on top of it with no issues.

Has anyone messed with the DC-541?  It's a rust-colored primer of the same brand
Same for me regarding the drying time, DC540 dries very quickly. Depending on how picky I am about the project, I sand it off and recoat several times. I have not tried the 541, but I did try the Duplicolor brand white "sandable" primer hoping for good coverage with less of my white base color. I was hoping, even expecting it to be basically the same stuff.... BIG BIG BIG mistake. It ain't even close. It did dry just as fast, but was as hard as a rock and hardly sandable. I gave up after I ran out of elbow grease, and needless to say, I did not recoat it like I do with the 540.
Rusty
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