Mad scientist, full hood of steampunk design.

Step 3 Finishing goggles

Shape the bottom of the lens until it matches the curve of the frame, I used 3/32 aircrat rivets, be sure to drill all hole in plastic at least 1/16 over rivet size so as to not crack the plastic. 
I cut the copper attach strips long then trimed them back at fitting.
Solder in the grills after painting them with clear red paint.
The top part was attached with studs from the leather shop.

The clear globes were colored with gray clear paint, found at hobby shops, the frames were polished alu, with green and gray clear paint.
The mouth peice is very simple cut out with a grid riveted in place.