Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

This is the spray I started off with but I am not recommend this brand, it protects well but anything more than a single light to medium coat will start to make the art look cloudy and if you really put to much on the art will look like a milk jug cloudy.
  The good stuff that museums and charcoal artists use to protect old documents and charcoal pencil art you can put several coats on and the protected work looks the same, you don't need several coats but you do not risk covering the artwork of the kit.

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