box gutter maintenance

I am having my box gutters re-lined using galvanized steel. Contractor One says they do not need to be painted; Contractor Two says they do, using a Rustoleum-type paint, and that they will need to be repainted every 4 or 5 years as regular maintenance. Do box gutters need regular painting?
Also, does the gauge of the steel make much of a difference? Contractor One specifies 24-gauge, Contractor Two does not specify the gauge.
FWIW, I will be getting at least one more quote.
Dee
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painting is more protection, but not the first year as the gutters, galvanized metal have an oily coating on them and must wear away, then use a primer for galvinized metal, not latex, then paint with oil paint
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Try to get quotes on using aluminum and then you won't have the painting problem.
Tom J
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