For something removable like your Jeep trim piece, I might try some HD velcro but use one of the 3m VHB(very high bond) tapes to hold the velcro to the plastic.
My Eastwood hood liner would NOT stay stuck to the underside of the bonnet due to the bedliner texture.
3M VHB tape has held it up no problem...
.
Holy adhesive costs Batman !
Always love learning about new wonder products.
The description "replaces rivets, welds, etc" truly reads like a wonder product
but $272 for three rolls ?
https://www.amazon.com/3M-Tape-5952...27887759&sr=8-1-spons&keywords=VHB+tape&psc=1