There were two objectives for this garage session. The first was to clean things up since the area of the garage where the R90S sat was full of scattered tools and parts and rags and chemicals. There were also many remnants of the tie-wraps used to sort out the wiring system. With the area partially cleaned up, I moved on to objective number two which was to get the seat and front turn signals back on the bike.
The seat hardware cleaned up nicely with the wire wheel and mounted easily. The rear decal on the seat assembly was tatty, so it came off and will await a replacement. 
The underseat and the seat foam seem to be in fairly good condition, and the rubber bumpers are ok as well so this part is easy.
The turn signals need a little work with some metal polish and fine steel wool. The result is excellent. Both sides get reattached to the bike.