PDP-8/E questions

I've got my PDP-8/E cleaned (no more "small" of cat) and partly re-assembled. I've successfully toggled in and run Allison's inchworm program. I handwashed the plastic front panel. I treated the plastic foam from under the backplanes to the hottest wash the washing machine can do, and replaced the rest of the foam (which was crumbly) from the lid. I ran the cards (not the core matrix, though!), backplanes, and over-the-top connectors through the dishwasher, along with some of the smaller parts of the case. I dried the cards with compressed air, and washed out the backplanes and connectors with IPA before blowing them dry too. I treated the switches to a little low-residue cleaner/lubricant. I washed the case with Flash (a proprietary household detergent-type cleaner for floors). I took the fans and relay out of the PSU and then sprayed the inside with enzyme/detergent-based stain remover, hosed it off, drained it, rinsed with about a litre of IPA and then dried it off (compressed air first, then warm air from the hair drier for a few hours). It smells fine now, and it's *very* clean :-) I've almost put everything back together, but I have a few questions before I finish it off. The front bezel (frame round the panel) has been repainted white, and the paint has flaked or chipped off in places, to reveal a chipped coat of beige paint. I'd like to refinish and respray it. What's the correct colour? I'm toying with the idea of replacing the LEDs with bi-pin bulbs, as the panel was originally a bulb panel. The resistors for the warm-up current have been clipped out. What value should they be? What's J5 (3-pin Mate-N-Lok) on the PSU for? And lastly (for now :-)), which direction should the fans blow? The fans in this machine are not original, and I suspect they were put in back-to-front. They were drawing air in from the right (as you look from the front) of the machine, through the cards, into the PSU, and blowing it out through the six large heatsinks and out of the left side of the machine. I think this is the wrong way round, as the laminar flow over the cards won't be as effective as the turbulent flow in the other direction. But what's the normal way in an 8/E? And was there supposed to be a filter anywhere?