TV recapping advice needed.

[ISawItOnTV]

I'm getting ready to replace around 20 or so old wax-paper/plastic style tubular capacitors in a '50s Raytheon TV, and have a few questions. I've done plenty of electrolytics before, so I don't need help regarding those or the wafer-ceramic types, as I'm leaving those in place. Due to the cramped chassis design, I've separated the CRT from the chassis, so I'll be shotgunning the caps.

I'm a little puzzled about "coupling" caps. I understand the function of coupling caps, what I don't understand is how to locate them in my schematic. I take it they are usually in series before and after various tubes in the circuit. Is that correct?

Do coupling caps have to be a different type than the remaining tubular caps I'll be replacing? Or, can I do these 20 or so caps with one type/style (for example: polyester, polypropylene etc)?

If any of you have advice (or pics) regarding your recapped TVs, I'd appreciate your help.