Should I use resin to repair a cracked Bay Window Column?

Cracked Bay Window Column

We have a Victorian house that was painted late last year. A few months later, a crack appeared in one of the two Bay Window Columns. We are looking into repairing it while the weather is warm.

The column is made of metal and is not completely solid. The inside is hollow and the side that faces the window is not filled in.

We tried a few places that we thought could fix this, but haven't found one yet. So, we're looking into doing a DIY repair on it!

We're thinking of using a resin to fill in the crack. We may need to get some type of vise to join the halves, but would using a resin designed to join metal resolve the issue? What type of resin should we use? Any advice on what type of vice to use, given the space constraints?

If this is something best left to the experts, we're happy to pay someone to do it, but we couldn't find anyone willing to. If you're out there, contact us!