Like the title says, I have no idea where to find Future Floor Finish (clear) for tightening up joints, nor what type of dremel and sander Radicons use for customizing.
Here's the floor polish. I suspect any Pledge will work at this point as they bought Future. Amazon.com - Johnson S C Inc #11182 Future Acrylic Floor Finish 27 oz - Floor Cleaners As for dremel, I'm actually curious as well what people would recommend.
Fingernail files are good to use for sanding, believe it or not. You will also want use a assortment of wet/dry sandpaper grits. As far as dremel, depends on your preference. I use the Dremel 3000 with variable speed.
I also use the 3000. It's so versatile. I also just got the Dremel drill press. For sanding, fingernail files (the stick kind), needle files and sandpaper rolled in strips.