Chainstay fender ideas

[pripru]

Hey there everyone, I recently purchased a Transition Sentinel frame and noticed that there is a descent gap in the pivot point where the chainstay meets the seat tube area there.

I have seen recently that some people cover that area up with a sort of "fender" so that rocks and debris don't fall in there and get things jammed up. I was wondering if anyone had any ideas on the best material to use for a long-term solution for this and how to attach it to the frame without damaging the paint at all. Any tips would be much appreciated thanks!

 

[DrGooGoo]

Posting a picture would be helpful.

Cut some plastic from a milk jug, paint it and neatly attach with zip ties?

 

[novocaine]

On frames with that "feature" we used to put a bit of sponge in the hole.