Removed sink in 179. Need to cover hole.

Regarding the sink removal, I removed the sink then cut off the drain pipe back inside the wall (but close to the coupling so I could put another one on if I ever wanted to) with a "cable style" pvc cutter. 

I bought a piece of Plaskolite polystyrene (0.050" thickness, I think) sheet, cut it to size to cover the hole, and painted it with a closely matching color of plastic paint.

After cleaning both the wall plastic and the new Plaskolite with alcohol, I applied Locktite Plastics Bonding System glue to both the wall plastic and the new plastic cover, positioned it carefully, and stuck it on.

I bought plastic rivets from Forest River in the right size and color to match what was in the bathroom, drilled holes, and put them on.  (I also used these rivets to fix the bathroom wall plastic near the door that was buckling up when the interior got hot.  Several Podders have mentioned this issue previously.)

I filled the remaining holes in the bathroom walls by smoothing them out and then filling them with clear 100% silicone calking and the dabbed matching paint over the calking with a Q-Tip.

I got everything to do the job at Home Depot.

I tried the method described by SteveA (heating and flattening the curved sink plastic) but my remnant was not big enough to fully cover the hole in the wall.

I can send pics of the finished project if you send me a PM.

2017 R-Pod 177 (Blue) HRE
2004 Outfitter Apex 8 camper
2014 Toyota Tundra DC