ZachDaddy, thanks for the hints which will be tried out as soon as it gets little bit warmer out there.
Do you recon taking a few screws out for polishing, putting them back in and moving on to another section?
I'll order a bit of Meguiers metal polish. Do you think a dremel will do the job or would I need another machine (orbital such as makita which could be also used to buff the hull if needed).
Thanks again for your tips, will let you know if and how it worked out.