arkansasdave wrote:It was primer sealer I sprayed Yesterday
So it was. Don't know where I got the idea it was basecoat.
Yeah, go for it. Sand it down flat to P800 wet, wash it clean, dry and go with your base.
As for the colour of your sealer the ideal will be in the formula that was used to make it up. Different brands of paints can call for different value shades depending on how they formulate the colour - whether it has high coverage or whether it relies on the undercoat for shading.
If the greys are similar then probably don't worry too much. Spray out a card to test if you like.