Looks like you got wax or silicone spray on the wood making it peel back from the spots. If you resand you might be able to clean it with acetone before you finish it.
Get a stand when you do order a Dewalt, it is so nice having it and get casters for it too. Makes it easy to push out of the way for cleaning. And your bench space can be used for better things like assembly and finishing.
If you can get graphite brushes even oversized you can easily shave them to size with a knife or a file and get the motor running again. Home Depot may have something, I've even found replacement brushes for Dremels at Wal Mart.
If you don't dry the wood completely the moisture will disrupt the stabilizing by pushing the resin back out as it turns to vapor when you cook it to cure the resin.
I've learned that polar blades are superior for cutting corian and plastics and anything else that heat buildup makes problems with.
What happens with UR is the material welds itself back together as you cut, most annoying.
Looks like you need to get your filtration in so the sawdust doesn't get sucked in and toasted. I see you have the type that takes in outside air, good to have less chance of igniting dust and such.
Georgias climate is mild enough I went with a heat pump style window ac to keep the shop comfortable.
I have photoshop so i can manipulate the scale and ratios to any pattern to fit the wood I have available. When I print the patterns and spray glue them I let the glue dry down to a good tacky surface before application and this helps release the pattern easier when cleaning it up.