Rabbit bones glue 100 grams. Glue for linen or cotton. Make it 'Au bain Marie': Preferably 24 hours well the beads, add 1:1 with warm water. Next day, ad another 3 times extra water, reheat (non-kooking!) tot say 60-80 degrees Celcius for the adhesive layer. Bringon the canvas with a wide strong bristle spalter. After Immediately clean tools with hot water.