Your message is incomplete. But I'm a happpy camper and user of GCS Marina's services and would be happy to chat with you about my experiences there.
Modify that - the rest of your message just came through. I also have a steel
boat and have done a fair bit of sanding
and painting there (two part paints). Rumour has it that a neighboring yard - 1 pier N - has extensive metal work capacity. You might have to go back and forth or look for someone in the area with welding expertise. There was one guy in the yard doing a lot of aluminum
work last year, so I don't think there is any problem in the yard (except that I asked and they are not interested in allowing sandblasting). Skilled people to help in what is primarily a DIY project
- the cafe across the highway would be a great place to ask questions about that. Lots of cruisers hanging out there. Send PM if you want to talk more.