If you are thinking of going with Zaino, just go with Zaino.
Saving an hour or two the first time isn't worth all the extra money you'd spend buying a line of Meguiar's products, then buying a line of Zaino products... and you'd probably want to buy new detailing cloths since you've read about cross-contamination, etc, etc, etc.
It's a big expense to switch, it's best to start with what you want to stick with.
And never assume a dealership did a good job. Most of them don't... some do.
Saving an hour or two the first time isn't worth all the extra money you'd spend buying a line of Meguiar's products, then buying a line of Zaino products... and you'd probably want to buy new detailing cloths since you've read about cross-contamination, etc, etc, etc.
It's a big expense to switch, it's best to start with what you want to stick with.
And never assume a dealership did a good job. Most of them don't... some do.