In the final step of Meguiars process I like to use Zym–l wax.

Zymol contains no harsh petrochemical solvents, making it safe to apply on all paint finishes including brand new cars. Zymol has an extremely high Carnauba content (32 to 70%) and the Carnauba used is the very highest available grade - Brazilian No. 1 Yellow and White Carnauba. This gives both greater protection and increased depth of shine as compared with other products. Zymol is an enzyme mixture until it is actually applied to the car. Only at that point, when oxygen acts as the catalyst, does Zymol become 'wax' and start bonding to the car's surface. Zymol wax is very easy to apply and remove and will not leave any white 'residue' along seams, in cracks or on black plastic trim.