Which brakevan looks worst?

I'm not sure, a dremel is only as good as the person using it coping saws are small with a thin blade there is also a jewelers saw which is also delicate. The putty once dried and painted would be waterproof.

A coping saw would be better then? My parents think that it may be too large for the job...
And by floating I meant in air while it's drying, not in water. I'll try to word it better: if I had a piece of the putty molded so that some of it was not attached to anything, is it likely that it would collapse before drying?