Give the underneath a nice, sand scrub and removed the T-Nuts today, followed by 2 coats of clear gloss( out the can). Still undecided on wether to keep the inserts or replace so I used a syringe to fill with water to stop the clear sticking to the critical part. Don't know if this has been done before, but it worked a treat 
This is just to make it a little prettier. Will leave this for a day or two, then start giving the play field a good scrub and clear also. Then start the artwork( this will be fun )