I would get this one and apply two coats.
Turtle Wax T-223 Super Hard Shell Paste Wax - 9.5 oz (Pack of 1) https://www.amazon.com/dp/B000BPSVJ6/ref=cm_sw_r_cp_api_i_6.upFbZSYRFDN
This is the wax that I used. I didn't do any sort of sanding after the paint was on.