I've never modified the equipment of any of my games and generally I don't like the idea if the changes cannot be simply undone.
I have a copy of Broadsides and Boarding Parties and thought it might be nice to make sails for the ships, leaving the game playable. The masts will be removed potentially during play and the mainmast has two pieces. Pictures of my ships can be found below:
The masts are not strong plastic and so I was thinking of using crepe paper. I want to rig according to the info found here. I'd prefer to be able to simply remove the sails rather than pasting them on. Any ideas how to make it and what the rigging ought look like?
I think crepe will be much too fragile - I would go with a simple cloth - it will look better too.
There are some kinds of glue that can be unglued easily - much like it work with a Post-It. I would suggest you place this kind of glue on the sails at the right positions - it will allow you to quickly attach and detach them from the masts.
I personally would use a thin cloth. If you want it the look wind blown; soak the cloth in a half water/white glue mixture and let it harden it the shape you want. Also you could always build new masts to replace the current ones. Then you don't have to alter those, plus you could make them a be stronger plastic. When you want to play just pull the masts out and replace them with the bare ones. For the rigging it depends on how crazy you want to get. Something like this http://shipmodeling.info/photo/displayimage-772-fullsize-Ful... which will take a long time