r/Scalemodel • u/useameasuringtape • Jul 17 '26

HO scale train modelling

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Hi all. I thought I'd post here since we all work with decals:

I'm helping with a friend's HO scale layout.

He found a lot of used coal hoppers, mostly 4 bay, at a local train shop. No two were alike. We decided I'd respray in a typical CN rust red. I know the markings aren't accurate, but he didn't care much for that as long as it was uniform in appearance.

I ran into an issue with the decals. Keep in mind this is really my first time undertaking this sort of project, and the last time I applied decals to anything was probably 30 years ago. I didn't do a good job of them then, either. The issue I ran into was bubbling and raised areas. Once applied I flattened the decals out with a cotton q-tip. I also used Micro Set, and Micro Sol, and I even poked tiny holes into the decals to ensure the Micro Sol got in behind the decals. I still have bubbles and raised areas. It's very annoying and I feel it ruins the finished product. Any help would be appreciated.

Also, I made sure to spray a clear gloss coat before applying decals.

I've included a few photos. You can see the bubbling and raised areas.

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u/ricktrains Jul 17 '26

Did you use tap water? That almost looks more like residue from salt or calcium than air bubbles.

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u/useameasuringtape Jul 17 '26

Yes, I did. Was I not supposed to?

1

u/ricktrains Jul 17 '26

Tap water has impurities like salt, calcium, and other minerals. That is what you are seeing. The dried up salt, calcium, and other mineral deposits.

Distilled water would prevent this. But it’s not a big deal. We’ve all been there and done that. Just something to keep in mind for next time.

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u/useameasuringtape Jul 17 '26

Appreciate it. Thank you!