Best way is to start all over but I would use auto paint and get the harden for it.That way you can mix the harden in with the paint and do a two coat and you will have a nice looking bicycle.I hope you have a good spray gun to work with if not have a auto body shop to do it for you.Spray painting is very easy to do with the right stuff on hand.I have painted a lot of cars and an old time Model T car.Its fun to do it your self you can give it a whole new look if you have a spray gun and a air brush it can even be better than what came on it if you do it the right way and have a very nice ride for her.One she can say my BF did this for me.But do it the wrong way and she will not like it at all lol.And say look what he did to my bicycle.