Had the original 6 spoke alloys, and their condition deteriorated with paint flaking from them, but no lead weights so they are still round. Two were very bad at maintaining pressure, so much so I swapped my foot pump for a compressor as 20 minutes a week pumping them up was irritating. Even after refitting and new valves the problem remained, I put up with it until new tyres were needed, but the problem was still there.
I recently gave up and got a set of 9 spoke alloys from a facelift model.
It seems that an alloy can become 'porous' especially if it has signs of corrosion, I believe the early wheels were not up to expected Honda standard, as the dealer said they would have changed them if I had asked in warranty, and had swapped many (also with the S2000).
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TG