Repaint on my E36 M3

[tooshfty]

Hey guys, I have a little story and question to ask...
So I was pulling out of my driveway a while back when I scraped the side of the building with my car, it wasn't a huge deal but my buddies and I blew the scratches out of proportion and made a petty attempt to sand it down and paint it back on with touchup... Anyways we've found ourselves repainting a larger portion of the door panel, but not the entirety of the door, so we hope to blend it a little to avoid repainting the whole door. Anyways, we have the color matched paint primer and clear coat. Along with the whole assortment of sandpapers from 200-3000 grit. We just finished priming the door. What should our next steps be? Im thinking wet sand with 600, what about after that?

[Court M3]

Are you using a paint gun or aerosols? Youtube has plenty of great videos covering this, quick search turned up these

https://www.youtube.com/watch?v=fKy9YwfLQ6U
https://www.youtube.com/watch?v=LtwX8rrcEUQ