Putting things on/near cast iron radiators

Hello,

I have two questions:

1) In my dining room, we have cast iron hot water baseboard radiators that wrap around the room. We also have an antique wooden corner cabinet that we would like to put in the corner of the room (for much-needed storage). However, we are worried that putting the cabinet in the corner with the baseboard radiators will start a fire or damage the cabinet.

Is this a bad idea? If we leave 2 inches of clearance, would that be okay? How much clearance is the minimum?

2) Elsewhere in our house, we have standard, free-standing non-baseboard radiators. We would like to put slabs of marble or other stone on top of them, so we can put plants, lamps, etc. on top of them. Is this a bad idea?

Thank you,

Eliza

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