I recently found this photo I thought I had lost many moons ago, my RV4 over Johnson Creek ID circa 97'.
I couldn't afford paint or amenities so I opted for Met-All polish, "rag bag" from Home Depot with a drill attachment buffer and corn starch. A couple of rattle cans of Kry-Lon for trim, hardware store N numbers from the mail box section and voila', a $16K Sport Plane.
I enjoyed the polished look and weight/cost savings with only two noticeable gripes:
1. On bright sunny days the reflection off the wing shined perfectly into the cockpit with associated temperature increase.
2. Living in FL required monthly polishing touch ups to avoid corrosion.
I finally decided to paint while at a rural KS fuel stop coming home from ID.
The elderly airport manager took one look at my RV4 and said: "Paint or polish, make a decision!"