I will try and look for it as well. maybe if linseed oil on cheaper blade does not work for me...will look for the osmo oil.
Is there a way to remove sealant on other blade handle?
Short answer is just sand it off in most cases, but really it also depends on what the sealant is, and how deep it's penetrated into both the handle scales and the core woods inside the playing surface.
If it's oil based polyurethane, it's best to probably lightly sand it off, as the oil based stuff is more likely to stay on the outside surface of the wood and form a akin-like physical barrier. 🤔
If it's water-based poly though it's probably seeped much deeper into the wood than the oil based stuff. Again a light sand should do it, assuming the normal moisture content in the wood isn't too low (nb: drier wood is usually thirsty wood, and if the water based poly was very thin stuff, it could have gone 1, 2 or even 3mm deep or more into the wood, in which case you'll never get rid of all if it, but you don't really need to either, as a light sanding will still get rid of most of it on the outermost layers 🤔
I'd definitely stay away from all solvent-based sealant remover / paint stripper products if I were you. Apart from the awful stink and health risks, there's a very good chance the glues in your blade will start to dissolve as well, increasing the risk of your outer veneers lifting in some spots. 🤔🤔
With drying oil based sealants (linseed & tung oil, Danish oil, etc) again they can penetrate quite deep into the wood at times, as a lot of commercial products have a fair amount of thinners in them (which also increases the possibility of lifting your outer veneers if the outermost glue lines are a bit dodgy.) Once again a gentle sand should do the trick, just really watch out for your core wood layer, as this is typically the softest & lowest density wood in a blade, and will sand away very quickly as a result. Poly based sealants tend to stiffen the core wood's outer layer so it's a bit more impervious, but drying oils don't toughen the wood as much. 🤔
If it's a burnish seal or if it's been sealed with super glue / cyanoacrylate, or (even worse) an epoxy based product, then basically good luck with that. In all the above cases there's a good chance of you losing a fair amount of wood if you try to sand all of the sealant off, and while acetone will weaken the super glue sealant nicely it'll also definitely dissolve the wood dye in your handles as well and attack your scale glue too (...yet to find a good way around these ones myself).
If it's sealed with something like Osmo oil, beeswax candle wax or canuba wax then it's a bit easier... With Osmo oil, most of the wax outer layer will come off with a metal scraper. You can then use some localised gentle heat and 240 grit to remove the residual bits if you like. The drying-oil based layer underneath it will remain impregnated in the wood, but it's really not necessary to remove that.
Hope this helps.
