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Originally Posted by PorPorMe  I'm adding larger HSF to the chipset on the EVGA 780i and in doing so came up with an idea ( I'm sure it's not original ) that will aid in lapping heatsinks-especially aluminum base ones. The picure shows different states of anodized aluminum and that is what gave me the idea to put a very light coat of paint on it for the initial sanding. As you can see, the anodizing makes it simple to tell if you have it flat, and these certainly were not.
I would suggest making the paint very thin-even see through, or it will clog your sand paper. |
There's just one small detail that's not good you are overlooking going about it this way with paint.
As you know there are "Microscopic" valleys, (that can't be seen with the naked eye) nicks & scratches on the surface of a metal heatsink.
When you put paint into these imperfections it's going to be impossible to get them out without taking the whole metal surface down to where you got nothing but metal again.
What looks good to the eye in fact will still have paint filling in the imperfections which will then lead to higher temps because the TIM won't be able to fill these in which is what it's designed to do.
So now you got a LOT of sanding to do to get it back down to nothing but metal again Mike.
So this really is a bad idea & not a good one!
Sorry to be a kill joy here, just thought I should point this out before you do this again.
Anyways, if you got higher temps then you had before now you know why.
