Would it be worth replacing my supremacy's copper base with nickel plated? I know copper isn't ideal for lm application, doesn't it soak it up/dry things out? I like my copper base but if it means more time between reapplication I'll get nickel. Would be my first actually, I'm a total sloot for copper
You're referring to the TIM correct?
If so, NO it doesn't.
There are more "valleys" between the two with Copper. But that's all. I run Copper blocks and never had a problem with TIM drying out or soaking into Copper. TIM fills the microscopic valleys and that's it. That's what you want for better heat transfer anyway.
You'd just be wasting money on a new base unless you wanted to change aesthetics by going with Nickel over Copper. There is really no performance difference between the two.