Your info shows that you are from Mass. It's a rust belt state!!! The Mass Tpk as well as Interstates 95. 295 and 495 turn WHITE after a single snowflake has fallen. The non-interstate highways and roads are worse - plus it is always there 24/7/365 embedded in the road materials. You have seen, as noted earlier, the tip of the iceberg with other places on that car starting to succumb to rot. If you really like the car, want to keep it for years, then it needs to have a full, including the undersides, checked for advanced rot. Then decide if it's worth a full rehab or, just go enjoy yourself with a fun car.
To respond to your original question - ANY rattle can silver will never be a good choice. The original has faded, the shiny new paint will stick out like that proverbial sore thumb and even worse the the rusty spots. Then to make it even worse, the European paints have been attacked by the ecology people in CE and the European Union - and is IMHO, a 'poor' paint to begin with.