I like the green--it keeps the colors from becoming too saccharine. If you aren't sure about quilting, machining or tying, how about some embroidery? You could use perle cotton to outline stitch, following the outsides of each hexagon ring and burying the ends of the threads just like in quilting. If you make the stitches large it will go quickly and if they are even they will look good on the back. You could also try running stitch, as in quilting but maybe 3 to the inch. Since it is a 'rescued' quilt you can think outside the box (or hexagon) and also make it as sturdy as possible. It will be fun!