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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Sun Jun 10, 2018 7:08 pm 

Joined: Sat Oct 17, 2015 5:55 pm
Posts: 502
Have any roofing tar that comes in a gallon paint can? I think it might contain fiberglass, too. That would work until you can do a proper repair.


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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Sun Jun 10, 2018 10:09 pm 

Joined: Tue Aug 02, 2005 1:25 pm
Posts: 5255
PMC -

Will pass that idea along. Thanks.


Les


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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Sun Jun 10, 2018 10:40 pm 

Joined: Sun Aug 22, 2004 7:19 am
Posts: 5419
Location: southeastern USA
There's a type of Bondo that has fibres intermixed in the epoxy which do wonders on less wide holes. Cat Hair is the unofficial name.... for the larger holes Great Stuff can fill the holes leaving a surface that can be sanded to just below the level of the steel, and then covered with Bondo. Neither will last for decades especially in service, but will buy you years in static display. Another possibility is a type of elastomeric roof coating that is used with a strip of fiber tape which is bedded in it, than covered with paintable elastomer. Leaving the holes open for water infiltration is a higher priority than a paint job for long term preservation - try some of these and see what works for you.

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"Techies never minded eating bits and jots of their work. They were grit and grease inside and out and could turn a pile of junk into a magical kingdom."

Andrea Hairston


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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Sun Jun 10, 2018 10:59 pm 

Joined: Tue Aug 02, 2005 1:25 pm
Posts: 5255
Thanks Dave. Will also pass your comments along.

Les


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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Mon Jun 11, 2018 1:51 am 

Joined: Sat Oct 17, 2015 5:55 pm
Posts: 502
That's a good idea about the Great Stuff Dave. For those who haven't seen it it comes in a can like whipped cream topping does, it actually has the same consistency as whipped cream when wet but dries in a few minutes into something like a tough Styrofoam. If you could reach the bottom of the holes you could spray about a fist sized bunch of that stuff up there so that it plugs the hole from below, and then paint over the top of it.


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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Mon Jun 11, 2018 11:13 am 

Joined: Thu Aug 26, 2004 2:50 pm
Posts: 2225
Location: Northern Illinois
PMC wrote:
That's a good idea about the Great Stuff Dave. For those who haven't seen it it comes in a can like whipped cream topping does, it actually has the same consistency as whipped cream when wet but dries in a few minutes...


More than a couple minutes. Great Stuff is a polyurethane foam that uses water vapor in the environment as the catalyst. After you fill the void with the foam as it comes out of the can, it will swell as it sets up... and continue to swell for the next day or so until it is completely cured. I used this years ago to fill the holes where knots had fallen out of the "rustic" siding on a house I bought. The missing knots exposed the black Celotex sheathing board behind, and all those black circles were irresistible to house sparrows and several other species of birds, who would start pecking at the Cellotex to enlarge the hole and provide nest site.

I filled the holes with Great Stuff and tooled it off as best I could as it set. The next day the house looked like it had warts, as the foam had continued to swell 2 to 3 times in volume. After it stopped swelling it was easy enough to rasp it flush with a Stanley "Sure Form" tool, but if it hadn't fully cured, it would swell out again. Once it stopped swelling and was smoothed off, it took solid color oil stain well enough. It's soft enough that the birds could easily peck it out; the secret is they don't see the resulting surface as a hole, so don't try.

I've also used it for lightweight scenery on a portable model railroad, using it to fill the gaps between pink foamboard. If it gets trapped, the resulting pressure is enough to bend 1" rigid foam, or blow the joints apart. But once cured it's stable and doesn't shrink. It would indeed be excellent for providing a backer than can be cut back to provide a recess for one of the polyester auto body fillers, but definitely leave it sit and cure several days before covering it.

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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Mon Jun 11, 2018 6:03 pm 

Joined: Sun Nov 25, 2012 7:22 pm
Posts: 46
Location: Northwest Indiana
Ya gotta be careful as some of those expanding foam products
will hold moisture.



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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Mon Jun 11, 2018 6:42 pm 

Joined: Sun Aug 22, 2004 7:19 am
Posts: 5419
Location: southeastern USA
Can't hold moisture that can't get in once the holes are filled and sealed.

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"Techies never minded eating bits and jots of their work. They were grit and grease inside and out and could turn a pile of junk into a magical kingdom."

Andrea Hairston


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 Post subject: Re: Nickel Plate baggage car #344 restoration starts at HVRM
PostPosted: Sun Jun 17, 2018 9:15 pm 

Joined: Tue Aug 02, 2005 1:25 pm
Posts: 5255
Mark continues to make progress on NKP 344. He opened the automobile doors on the one end of the car, as can be seen in the first two photos he took on 6/16. He also managed to clean and then paint the two trucks on one side of the car and the results on one of those trucks is shown in the third shot which I took earlier today (6/17). The green highlights are a reflection of the jade green paint from Penn Central box car #153177.

Les


Attachments:
Automobile doors NKP 344 on June 16, 2018.JPG
Automobile doors NKP 344 on June 16, 2018.JPG [ 343.01 KiB | Viewed 290 times ]
Automobile doors NKP 344 June 16, 2018.JPG
Automobile doors NKP 344 June 16, 2018.JPG [ 214.51 KiB | Viewed 290 times ]
Ninety five degree day at HVRM 6-17-18 007.JPG
Ninety five degree day at HVRM 6-17-18 007.JPG [ 336.13 KiB | Viewed 290 times ]
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