All,
First, just have to say I found an HP 6624a at a local thrift store for, wait for it... $10 US. And yes, it works perfectly from what I've checked so far (need to delve into the manual a bit more, as I'm not sure if it's supposed to store the last state of the output on power down/up). Anyway, it has a fair bit of sticker residue on the front panel, including on the display area. I know something like lighter fluid (largely naphtha) will remove it, but I'm pretty sure that'll damage the plastic.
Anyone have any tips for this type of thing? Obviously one option would be to tear it all down and clean it in the sink with some soap and water and elbow grease, but I've never been very happy with sticker residue removal in that case.
Thanks!