to maintain the life of the pint i personally use this routine,

wash evey week even if i dont drive it
Wax once a month
Polish every 3 months
clay bar every year (some times twice)

Also every 3 months I detail the bay and with every wax job I full clean the inner guards, wheel wells, inside the doors/hood and boot and hit the seals with some protectant.

Clay bar and quality car care products are one of the best investmetns will make. also remember to use good cloths and wash them after every use. If u drop a sponge or cloth on the ground stop using it till its clean.

Wash the car from the top down always!!!!!!!!