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  • September 27, 2021, 02:14:10 AM

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Author Topic: DC-540 primer.  (Read 998 times)

Offline Perry Rose

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DC-540 primer.
« on: February 12, 2020, 12:02:54 PM »
Have we decided on a replacement for DC-540? If so what is it?
I may be wrong but I doubt it.
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Offline Avaiojet

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Re: DC-540 primer.
« Reply #1 on: February 12, 2020, 03:10:49 PM »
« Last Edit: February 12, 2020, 03:28:48 PM by Avaiojet »
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Offline wwwarbird

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Re: DC-540 primer.
« Reply #2 on: February 12, 2020, 07:00:42 PM »
Have we decided on a replacement for DC-540? If so what is it?

 Each time mine runs out I replace it with another can of DC540.  :)
Narrowly averting disaster since 1964! 

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Offline Dennis Toth

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Re: DC-540 primer.
« Reply #3 on: February 12, 2020, 08:19:40 PM »
Ty is right, butyrate dope is not compatible over acrylic lacquer (see attached chart).

Best,   DennisT
« Last Edit: February 14, 2020, 08:31:05 AM by Dennis Toth »

Offline bill bischoff

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Re: DC-540 primer.
« Reply #4 on: February 13, 2020, 02:06:48 PM »
Elsewhere on Stunt Hangar there was talk of Harbor Freight's spray can primer being a substitute for DC 540. After being thoroughly disgusted with my last can of DC 540, I bought some of the Harbor Freight primer. However, I haven't had good enough weather to use it yet.

I got to use some of it the other day. Seemed just like the good/old DC540 to me.

BB
« Last Edit: February 16, 2020, 04:53:54 PM by bill bischoff »

Offline Paul Wood

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Re: DC-540 primer.
« Reply #5 on: February 13, 2020, 03:06:59 PM »
Perry,

I use Dupli-Color high-build gray primer from the auto supply stores. It's lacquer based and I've used it over Minnwax Polycrylic (water based) with good results. Fills the sand paper pretty quickly, so I have better luck wet sanding. I use Windex to keep the sand paper clean. NOTE, I do not use dope, only lacquer or enamel for a top coat.

Paul

Offline Bootlegger

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Re: DC-540 primer.
« Reply #6 on: February 13, 2020, 05:31:32 PM »

        Perry, I have a few cans if you want to come and get them...
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Offline Al Ferraro

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Re: DC-540 primer.
« Reply #7 on: February 15, 2020, 06:18:24 PM »
 I gave a can to Sparky to test and he loves it.  y1
Al

Offline Dennis Toth

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Re: DC-540 primer.
« Reply #8 on: September 03, 2021, 01:58:18 PM »
Al/Sparky,
Any update on the Crest primer? Where do you buy it?

From the chart I posted early in the thread it seems that it is a good idea to give any primer (other than based butyrate primer) a coat of Nitrate to seal (Nitrate go under all type of paint we use and over all but butyrate and Aero Gloss) and have a good base for butyrate dope.

Bill,
What is the number and description of the Harbor Freight primer?

Best,    DennisT

Offline bill bischoff

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Re: DC-540 primer.
« Reply #9 on: September 04, 2021, 08:29:34 PM »
The Harbor Freight primer I used is called "Iron Armor Sandable Primer". It is item #60789

Offline Dennis Toth

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Re: DC-540 primer.
« Reply #10 on: September 13, 2021, 04:52:14 PM »
I got the Harbor Freight "Iron Armor Sandable Primer" gray, $5.99 in store. I applied it to a new built S1 Ringmaster fuse. It went on very smooth and dried nice. It also shows flaws easily so they can be filled and smoothed off. I am letting it gas off a few days before filling dings and get it ready for color.

Thanks Bill for the suggestion.

Best,   DennisT


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