I have been trying to photoetch some bicycles, golf cart steering wheels and brake
wheels in the past and each time I used only single sided etching. The results were OK
and not very encouraging. I finally decided to try double sided etching. I etched three
different motorcycles and brake wheels this time and I was pleasantly surprised at the
details that I was able to etch.
I used a low resolution printer (300 DPI instead of 600DPI) since I had some printer
problems and from the previous results did not think it will make a much of a
difference. After etching I could notice all the fine details that was printed including the
jagged edges from a 300DPI printer.  
Since these are zoomed macro pictures all the imperfections including the paint
surfaces roughness is seen. The motorcycles looks much better with the bare eye.