@ Are used you as hot adhesive to make hold your marquetry in the framing. Deposit your framework, face against table, center marquetry in its place, add hot adhesive in each corner, and a little more for the great models.
@ Let go your imagination for the completion of the framings. A visit out of hardware will make you discover tens of products different and as many ideas from completion; varnished, dyeings of all kinds, paintings of all colors without forgetting the blacks, gold and all the range of false-finish.
Good do-it-yourself.