I have the same color bike as you. If you're looking for ideas I stole this one from a wrenchmonkees bike to see what it would look like. Whatever you decide to do taper the tail as it goes from seat towards to the tire. If you're going for a triangular shape like that just soften the edges and it will look just like the picture. Nice work so far!
For dent removal I have also seen a few videos on youtube of people heating the edges of the dent with a hair dryer or heat gun and spraying the dent itself with a can of compressed air held upside down. When you hold the can upside down it sprays super cold liquid. The heat expands metal and cold makes it shrink. It might work if you have the supplies lying around!
For dent removal I have also seen a few videos on youtube of people heating the edges of the dent with a hair dryer or heat gun and spraying the dent itself with a can of compressed air held upside down. When you hold the can upside down it sprays super cold liquid. The heat expands metal and cold makes it shrink. It might work if you have the supplies lying around!