Our Black Trim Restorer will do you a great job, just follow instructions and clean your trim before applying.
Post up some before & after pics.
https://adamspolishes.com/collections/wheel-tire-cleaning-liquids-chemicals/products/adam-s-black-trim-restorer
Sounds like you have a good plan, I would use the H2O every 3 or 4 washes. No need for Spray Wax, it will mess with the hydrophobic properties that you get with SI02 products.
I would clean with alcohol like mentioned let dry then touch up, if it doesn't last your not out anything. I don't think you will have a problem IMHO.
Keep us posted.
I agree with the others, Graphene Spray Coating is easy to use on paint, trim & wheels. You won't be sorry with the ease of use and the results.
Remember to clay and do any paint correction first & do a prep wipe down before applying GSC.
Have fun!