I also have a Surf Blue Islander 2dr! The only "beach" thing I've added is this tire cover on the spare. You could look into some seat covers, maybe. There's another thread on here where someone had some of their plastic dash pieces hydro-dipped, you could try that.
I bought my Jeep strictly for hitting the beach and surf fishing while the wife enjoys looking for shells. Ours is silver but my simple beach thing would work for you... I have a happy crab and a grumpy crab on the doors and a compass on the hood.
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