Re: Bimini Top
I ran into the same problem first time out after installing my bimini. Wind caused it to shake back and forth even though it was furled away in the bimini cover some frame rivets scratched up the paint on my new aluminum.
This was my fix
I went to Home Depot and bought a length of the grey pipe insulator foam. It's not the small black stuff. This one is about 6-7 inches around. I cut a 6 inch piece off and it already has a slit in it. I mounted it on my frame just below the joint where it folds. My bracket has a stupid rivet on the part that hits the frame.
I tied it on with those tiny bungees. A plastic bottle of about 20 for about $4 is in Walmarts auto section. contains many different colors. Pic below tells me I need to put the red ones on
I leave the foam on my frame even when top is up because you can clip it on the lower frame section and when its up the foam can stay on. For me, that foam under the joint which stays clipped on (I only clip it around the lower piece so it stays on and does not interfere with the frame opening) when frame is up it also keeps my plastic windows off that joint and marring up:
As the other poster noted, I tie the back corners of the closed bimini onto cleats to keep the frame from swaying back and forth.
Walmart, 6 footers for a few bucks each, these can be cut and take a match and melt the end after cutting, I like mine long and just wrap the extra around for further support:
These tips may not be applicable to your situation, but you may be able to adapt some to your situation or it might help others. Each boat and bimini configuration is different. Hope this helps others that are putting on biminis. They also sell plastic frame hold down clips that can be attached to your gunnels available from a canvas shop.
Trailering with a trailerable cover will lessen some frame movement too. But mine also sways when the boat is in use when it's down because I didn't want to use those frame rests that holds the bimini 2 feet high when folded because it gets in the way of fishing.
I made the mistake of mounting my frame on top of my gunnels when I could should have mounted it inside. I have more room when its folded, So I had to take the above steps to protect the boat's finish.
Also, pull into a custom canvas shop and they can give you ideas on how to protect it from scratching.