Warren Newhauser wrote the following summary of the recent work done on the X-5000:
On the morning of Wed. Oct 7, Chuck Trabert, Chuck Pomazal and Warren Newhauser set out to begin the long awaited exterior restoration of the the Milw Rd Dynamometer car. We planned to spend the day doing a small but complete test of sandblasting and painting on the roof in order to work out any issues/problems before tackling the entire roof. Under the supervision of Coach Dept Curator Paul Cronin, we used his Clemco industrial sandblaster to blast a part of the roof using 40/80 and 10/20 grit crushed glass media in Yard 3. The sandblaster air was supplied by the Track Dept’s tow behind diesel compressor. Full safety gear was used including a positive pressure respirator safety helmet.
The sandblaster worked very well on areas with paint, taking it down to the bare metal very quickly. Where the roof had rusted, it took longer - much longer - to clean up the rust. Each roof panel, about 30”x40”, took about 5 minutes to blast.
After blasting 5 panels and the A/C duct above them, our next step was to power wash the bare metal with water and a metal wash solution called Hold Tight (not the Justin Bieber song!!), recommended by AGSCO who supplies the blast media to IRM. Hold Tight cleans contaminants/debris from the freshly blasted metal and prevents flash rust for up to 5 days. This is necessary if blasting and painting can not be done in the same day. To do this we borrowed B&G Dept’s pressure washer/tank on a trailer arrangement and filled the tank with about 100 gals of softened water from the Diner per Dave Diamond’s recommendation. We pressured washed the blasted steel roof panels, but we could not get the pressure washer to draw the Hold Tight solution so it ended up flash rusting a bit. The pressure washing did, however, remove a LOT of debris from the freshly blasted metal though. We later found we didn’t have the required “chemical” tip for the wand that would draw the metal wash in.
To deal with the flash rust, we applied, by brush, a metal prep solution to dissolve the flash rust and provide paint adhesion.
Lastly, by late afternoon, we then sprayed the Master Series primer on the panels and duct with Paul’s HVLP paint gun. This paint requires 2 coats of primer and one topcoat, thus one more primer coat will be needed before topcoat.
Unexpected Issues/Problems/Lessons Learned:
- During the day the blasted metal roof was so hot you couldn’t even put your hand on it even with gloves on. This caused us to wait until the sun went down a bit late afternoon before starting painting. Painting outside needs to be done early in the morning or later in the day if it’s exposed to the sun.
- The 10/20 media pits the metal roof more than the 40/80 media does, but removes the rust faster.
- In the past, we applied a roof sealants Permaflex and Vulkem (urethane rubber sealants which have lasted years) that are very difficult to remove with the sandblaster.
- Rusted metal takes a lot more effort to blast clean than painted metal.
- Pressure washing blasted metal removes a lot of debris in the metal.
Now that we have done a test, we know what needs to be done to take on the rest of the roof. Based on the current sandblasting rates it will likely require 8-12 hours more sandblasting, 2-3 hours power washing, 4 hours to apply primer coat #1, wait 4-24 hours to dry, 4 hours to apply primer coat #2, wait 4-24 hours to dry, then topcoat (4 hours).
Thanks to Paul Cronin and Dave Diamond for all your help.
We have lots of opportunities for volunteers to learning the restoration processes. Please reply in a comment to the blog if you are interested in helping.
Comments
Fri, 03-29-2024 21:26
We're slackers and spend more time working on the equipment in the shop than keeping all you readers updated. We'll work on it, but I'm sure updates [...]
Thu, 03-14-2024 08:02
What happened to the Department Blog? It's been over 2 years and I still regularly check for updates, but nothing comes...
Mon, 12-27-2021 16:28
Happy New Year to all the Departments at the Illinois railway Museum! Thanks for all the good work you do in railroad preservation. Ted Miles, [...]
Wed, 10-13-2021 13:33
Was the CB&Q 1309 every transported to IRM?I’ve been reading old issues of Rail&Wire and the car was mentioned several times.
Mon, 06-07-2021 22:40
I was wondering if in the model layout display what scale would you guys be using and would you be displaying model train history as well? Just [...]
Wed, 06-02-2021 17:27
Nice to see 428's cab back on. Looking forward to when it is operable!
Tue, 06-01-2021 16:47
I hope the work will continue on the UP #428. Now that they are the museum's connection to the national railroad network; she would be very [...]
Sat, 04-17-2021 23:07
What is the status of 126, the Milwaukee Buffet car that is in S. Dakota? Any guess on when or if it will get to IRM?
Wed, 04-14-2021 21:09
Perhaps it is time to scrap the remains of the c, B & Q 7128 to make room for the Villa Real. Ted miles, IRM member
Wed, 04-14-2021 15:26
Hi IRM my name is Jason and I was wonder If you guys would be willing to save a CN Dash8-40cm they are currently being retired by CN and being [...]
Fri, 04-09-2021 19:56
Bear in mind that the Nebraska Zephyr is an articulated train set, so cars cannot be inserted at will. Although cars and/or a second engine could be [...]
Wed, 03-31-2021 11:37
I believe Silver Pony is currently on the back burner, and has been put into storage in one of the barns. The car needs a lot of work done to it's [...]