[Boatanchors] Cleaning plastic tube sockets?

[J. Forster]

Philip Atchley wrote:

> Hello,
>
> Just a quick question here (Can I ever ask a quick question ;-)
>
> The servicing of a National NC-183R (Rack mount) is nearing completion
> and I've noticed that there is a white "film" on the underside of nearly
> all the black plastic [snip]

The blcak plastic is likely phenolic. I would not use WD-40. The white could be
rosin residue or metal oxides. Try some clean alcohol on a Q-Tip. Alcohol will
dissolve rosin residue.

-John