don't go for cutting, clay bar is the best option and durrani can do it for you, compound will waste perfectly fine paint and reduce the life of your...
no it looks pathetic even with a projector, the headlamp shape doesn't suit projector retrofit ( i mean it can easily be done but will not look good...
you can get one of the best sealants (wolfgang deep gloss sealant) in 6k, the cost is not justified at all, and in 6k thats an entire bottle you dont...