enam bhai turtle colour magic and mothers, meguiras are two differnt things , turtle colour magic having cleaning , masking ablities , revive the colour clearity while mothers claifornia and meguirs gc are natural waxes without any cleaners
i would say turtle colour magic is good for base prepration and if u top up with mothers or meguira's than results would be real good
since u have also silver ride so i would propose use synthetic wax like nxt, mothers syn fx over turtle colour magic and than see real magic 