I used R56 on my UCD canopy and it was a mess. I've learned some tricks for the next time I do it. After marking the canopy placement with a felt tip pen take some masking tape and mask off the area 1/8 inch outside of the felt tip pen marking. after applying a bead of glue you can place the canopy and clean the joint without screaking the glue all over the side of your plane. You'd be suprised how messy it gets. Water works to a small degree while the glue is still wet, but once it dries I found that water was useless. If the glue dries you can use alchohol to take it off.