The clear will be "green" for awhile as it takes time for the solvents to work their way out and the clear to get hard. Depending on how many coats along with the temp will determine how long it takes.Usually 1-2 weeks. Setting it out in the sun will help.
DO NOT WAX IT!!!!! Or put ANYTHING else on it for that matter.
The LAST thing you want to do is seal the clear with wax or such.It still needs to expel the solvents and wax will seal it from doing this.
Have you asked the shop how long and what their recomendation is??