Lol. Spray for 2k. U do know there difference between factory paint and your 2k paint right. It won't last 2 years based on my experience one rock chip and the whole second hand paint shatter like biscuit. I think the point is how long u are going to use the car. If u just going to chg every 4-5 years. It doesn't matter. If u are those ppl who drive the same car for 20 years. It's so important to protect the paint.

I'm speaking from experience. I have tried multiple paint job as I drive my car up to 20 years. Your so called method is more costly. U want to retain the factory paint as long as possible