Spring perch repair help

[ProV1]

I posted a while ago about one of the spring perches rusting on my 97 E420. It looks like the previous owner had it repaired at a MB dealership, but their repair was to apply some thick silicone/rubber/? stuff along the contact points on both sides of the spring perch. the silicone is coming off on one side and I can see rust underneath.

I know a skilled local welder, so I wonder if I can have him take a look at the car and weld the contact points again for a good price, instead of paying $1000 per side at a local bodyshop? I don't see what else might be involved in this repair other than some skilled welding craftsmanship. Correct me if i'm wrong..