Accuphase C-270 - Cleanup and Capacitor Ident

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I have an Accuphase C-270 Preamplifier that I just bought. When I opened it up, there appears to be some mild water damage. What is the best product to do the following:

1) Cleanup the PC Boards dust and dirt
2) Cleanup the water corrosion on some of the components terminals

Basically I would like to bring this product back to factory state, so cleanup first, then I will measure the component values.

I saw two very interesting capacitors in the Line Amplifiers. The are marked with a 182J 2B3 and are clear at the base and top. In the middle the capacitor is copper color. The capacitor appears to be encased in a clear plastic type product. Has anyone seen these capacitors? What are they?
 
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