Hi,
I've been following the guide to making a river table, and got to the point where I needed to flatten the top (post resin pour).

After a while I found a place that would put my piece through their planer (other places had said they wouldn't do it if it wasn't their wood), and upon closer inspection the surface of the wood and resin has been left rather pitted in numerous patches:



Using a low grit on my orbital sander in an attempt to sand out has hardly touched it, and I'm left wondering what caused the pitting (maybe blunt blades of the planer?) and how to go about taking 1-2mm off the entire surface to get to a smooth-ish level state (ready for sanding through the grits).

What would people suggest? 

Is a router and jig the best way forward (as shown in the video tutorial)? I'm not keen on trying the planer again if I'm going to be left with similar results, and I don't think an electric handheld planer would rival the route and jig set up for a uniform finish? Happy to be corrected though!

Thanks for any ideas on what caused the poor finish, and options to go about correcting it. 

Sam.