I love #38 on tires and trim that I can care for at least every two weeks or so. I don't get very good life out of it though. It tends to fade as well as leave "runs" over anything below it, i.e lower rocker panels. If you can hit it avery two weeks you're okay.
I have the Trim Gel from CG's and don't care for the effort in application. Seems to take me three times as long as liquid-type products. Life is a lot better than the #38 but the gloss is more intense, even after knocking it down with a MF.
I tried 1Z's (discontinued due to VOC's) trim product which was super easy to use and just as durable as the CG Gel but more of a satin finish. Cannot remember the name.
IMHO, if its outside in the rain a bit, you're probably good with the Gel.