to keep dust and little itchy fingers away from your delicate models a glass case can enclose, encapsulate and protect you fine work. a case shouldn't cost more than £10 for small to medium size (£2 per piece) or £20 for a 1/72 flower class corvette size (£4 per piece of glass)
First seek out your local glass cutter, only order 3mm thickness glass as any thinner will be in danger of breaking and any thicker will be too heavy and refract light too widely in such a small viewing space. always measure in mm or cm but not both. When you call in the order have it written down clearly, remember to add 6mm to the length of the lid to overlap the end pieces.
when you collect the glass, hold it together to check what goes where, long before you introduce any glue, hold the pieces together with masking tape.
I use Serious Glue from B&Q, but any glue showing glass on the packaging should do the job. apply the glue using a cocktail stick to avoid dribbles and too much that squidges out when you sandwich it between close fitting glass edges. Watch out for sticky glue fingers leaving fingerprints in the glass, as they are tough to shift with a scalpel or stanley blade.