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| Joined: | Mon Nov 4th, 2013 |
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Use a lacquer as Helmut suggests.
Any solvent based resin where the carrier evaporates leaving an impregnated resin in the cardboard works almost indefinitely in my experience.
I usually use shellac in methyl alcohol,
but there are other more modern but more expensive similar treatments intended as preservative base coats for external joinery.
Many of my 'models' are built of cardboard cereal packets or similar.
If you make a mistake, throw it away & start again.
Helmut, I've never used superglue for reinforcing small cardboard parts.
Michael
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