Okay, let's get this cleared up...
As we know, Jan-the-river-one, you've been hanging out with Paul TBO, who uses extra virgin olive oil on his fretboard, apparently with great success (do a search on olive). But some of us think that a bit, well... unusual (though no reason at all to think it's bad, it just never occurred to us).
What you've posted here looks to me like lemon-flavored olive oil, if my limited Spanish(?) serves me.
There is also what those of us in the US would find, in the furniture polish section of stores, labeled as lemon oil. Old English is a popular brand, which I believe is mostly a mineral oil product with some lemon thrown in to make it smell a bit nicer. Another brand here is Jasco, again mostly mineral oil, and maybe a bit better quality, but same idea.
Mica has suggested using the pure extract of lemon skin, as you would find in a health foods store. No olives, no minerals (oil from a stone?), just the pure oil you would get by squashing the very outer skin, or zest, of a lemon. In some places, certainly here in California, you can also find pure lime, orange, and a few other varieties.
When Mica talks about these in person, her whole body relaxes, and she wistfully describes the long-chain turpene molecules (something like that, I'm not going to research tonight), and how good they are for replenishing wood, perhaps ebony in particular. And at one point, she mentioned how great it was to throw in a few drops of tangerine oil, though that was mostly for the sensation of smell.
Personally, so far I've used both Old English and Jasco, but am about to switch to pure lemon when my new instrument arrives.
I don't know what all this means, but I do have a sense that the citrus-based extracts may be somehow superior to those from olives or minerals. If anyone out there can shed some light on this, it would be appreciated.
