Ok, I'm probably more comfortable carefully grinding at it. What would I cut it with? A jigsaw? Or some kind of handsaw? There are 4 holes along the front for screws going through small rubber grommets. I guess I can just drill up new ones as the arch would either get too close to the middle ones or remove them completely?
I have cut plexiglass and even Lexan materials with most anything that you would use to cut wood.
I have cut plexiglass with my table saw, chop saw, and even a bandsaw without any problems what so ever. I would apply the masking tape to make sure you don't scratch the plexigalss while trimming it.
If you have a fine tooth blade for your jigsaw, you could try it and see how that works. Just remember, it is a plastic type compound and if you cut and heat up the material, it can reseal itself after the blade passes by. So slow speed blade movement is a better idea.
And if you are looking for a very smooth edge after you cut it, you can use a blow torch and flame treat the edge to make it smooth as if it was never cut. But be careful if you decide to do that. It doesn't take much heat to warp the edge either. It is a learning curve type issue.
If you go the grinding route, use whatever you have and see how it cuts and removed material as you go. Again, it is all a learning experience issue. But if you approach each method with respect, you will be okay.
Remember, you started this project not knowing basically anything about boat building, and you built a very nice boat. So use that same mental experience with this as well. Slow and easy to get the feel. JMHO
