On a dark red metallic Lexus IS250 would it be better to put Pinnacle Sig Series 2 over Opti-Seal or vice versa?

Thanks

Apply OS first and allow it to cure for 24 hours and then apply Sig II. The same would apply for any vehicle.

OS experts - What's the minimum recommended curing time for OS?

I'd add layers in 2 hours intervals. But the day-apart approach is the most appealing to me...

I wouldn't go under 30 mins.

Yeah, I usually give it at least 30 minutes before applying another layer of OS and longer if topping OS with a carnauba.

Anthony

Thanks for all the quick help... I will post pictures after the car is finished. (Doing it on Sunday)

Steven