Sanding the Cut-Lap

Hey All,

I'm gonna start cleaning up the lap line before the deck lam.  I watched the FG Hawaii video; the one with the purple lap job.  He sands with 50 and then 80, (seems a little low) When I sand down these high spots, the sanded areas look a few shades lighter, will that blend under the next laminate, or do I need to touch up with pigment to match?

Any advice is good, please & thank you.