How far does a fabric coating go?

[Coopers ST]

If I was to get a spray on fabric coating, how far does it go? If I want to apply it to seats and carpet of a smaller car how much would I need?

[GSKR]

Carpro or gyeon make pretty good fabric and leather protection.Cover the cost on each car and add 75.00 and up.Cap it at 100.00 for the labor .That stuff isn't cheap.

[GSKR]

Or hi-tech industries gives you a nice tall can .For know where the price of Carpro or gyeon small bottles.There for more profit lower cost to buy product.

[Coopers ST]

This would be for me. Wondering if one bottle is enough.

[GSKR]

Oh than go with cquartz maybe every 3 months apply.

[Eldorado2k]

How does ScotchGard compare to these fancy fabric coating products that come in tiny bottles? Is it even comparable or is it apples to oranges?