My 14 Tri came with Expel clear bra installed (found the receipt in the tour pak ... installed 10/2019. Looks like new to this day. I had a small "dent" in the fender lower right where I'm guessing a small rock or big bug got it. Didn't touch the paint. I called Expel's number on the receipt to see if their lifetime warrantee extended to me. They said to give it a couple weeks to see if it "healed" itself. If it didn't, call them again and they would replace that fender's covering.
The stuff is amazing. It did "heal" the little dent. But, what I like most about it is that I know it's there and I can't hardly see it. Nobody notices it unless I point it out.
When I did the ceramic paint coating, I went right over it, just made it more shinny like the paint ... LOL. I did call Expel and McKey's 37 (makers of the ceramic) and both said it would work great, it did.
So basically, it comes down to what you like the look of best. I'm not gonna presume to know what's in your heart. But, since you asked for advice, I'll tell you what's in mine ....
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That's a gorgeous trike. The red poops. I wouldn't cover an inch of it. I think I would just put some ceramic paint sealer on it and call it a day. That stuff is amazing.
Here's an example. Your trike is not "weathered" like my truck was, but, it will give you an idea how good this stuff works (the ceramic).
Right side has the sealer, left side just cleaned.