Buying cast iron radiators

Are cast iron radiators as efficient as modern radiators?

Can I replace a modern panel radiator with a traditional cast iron one?

Does powder coating risk causing leaks?

How big should my cast iron radiator be?

How does delta T affect heat output?

I’m buying a large radiator, what do you mean by extra leg sections?

I need my radiator to be a certain length, how many sections do I need?

Is Pewter just a primer?

What does partial home assembly mean?

What is the maximum operating pressure of a cast iron radiator?

What is the maximum size of radiator I can have?

What’s the difference between powder coat and spray painted finishes?

Why do I need to specify whether the radiator is going upstairs or downstairs?