Corrugated roof

Graham

Graham

In Smoggy Land
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Having seen a paper crimped used to make roofing sheets from aluminium foil baking tray I thought I shall do that for my foam building. So the crimping goody was obtained along with some Tesco cheap baking trays. So far so good, chop out suitable bits of the tray and run through crimper and great result. Now I come to paint them and find the surface of the Ali appears to h ave a none stick coating and the paint does not stick very well and tends to go like rain on a polished car. So I took a sample and washed it in warm soapy water and not much better. Tamiya spray primer appears to work sort of. Anyone had similar experience:wasntme:
 
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No! But I assume you gave it a good degrease with white spirit or something. You could try watered down emulsion paint mixed with some washing up liquid to overcome the surface tension. It can work on other "shiny" stuff.
 
Have you tried fine wet and dry, then degreasing BEFORE running it through the crimper??

Also, perceived wisdom on Aluminium is to use an etching primer.. Not sure how easy this would be to get in a rattle-can though??
 
PhilP said:
Have you tried fine wet and dry, then degreasing BEFORE running it through the crimper??

Also, perceived wisdom on Aluminium is to use an etching primer.. Not sure how easy this would be to get in a rattle-can though??
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Rattle-can etch primer is available from Half-rods, I used loads on the 'Beast'!
 
Thanks for the input I shall experiment based on the comments :wasntme:
 
Yep - etching primer is a must for ali.
 
Why not try used Baked Bean or Dog Food tins? Worked for me. Rust well in time even after they have been rattle canned. Oh take paint well too.
As built for the Ruschbahn.image.jpegNow that some rust has taken hold.
image.jpeg
Still in the same place as built but that part of the layout moved to my Garden on closure of the Ruschbahn.

Heavy Timber Planking used for the sides and clad in the Corrugated Tinplate salvaged from Dog Food Tins, nailed on with Steel Nails. Only changes have been a new removable Lead Flashing Roof and the inside modified to hold the Gravel Loads that go into the Hopper Wagons between loaded runs.
 
korm kormsen said:
lazyness. baking forms can be cut with any scissors. cutting and flatening tins is much more work.
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Indeed it is but in all things you get what you reap. I just happen to prefer the patinia of real rust and am prepared to work to get it. As for flattening the Tin, a friend used to heat the cut pieces to Red Hot then put em on a heat safe surface and plonk an old smoothing iron on. Works pretty well for flattening them out and also gets a good start with the rusting/weathering process.
 
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