Adhesive Removal?

[29er]

I recently acquired a used Eastman Octave mandolin that the previous owner had applied a clear pick guard. Not liking the guard, I removed it thinking the adhesive could be taken off with naphtha. Several attempts with the naphtha have not quite removed the residue (see pic) What is my next step? More naphtha or try a stronger chemical?

[hubcapsc]

stronger chemical?

I'm not a chemist. This would darken unfinished wood... finished?

I peeled the lawyer stickers off my motorcycle's gas tank and
wiped (yes just wiped a little) the sticker goo off with a boiled
linseed oil soaked rag. Different things go after different kinds of
sticker goo (and I'm unqualified to say which things will melt
your finish), but hopefully there is something out there for you
to resort to before you have to go with hydrochloric acid ...

-Mike

[John Arnold]

Polishing compound and a cotton cloth. I like Mother's Mag and Aluminum Polish.

[Taylor Ham]

two possibilities: there's more residue, or no residue and the finish itself has been affected.

if the area is smooth and dry to the touch after wiping, i'd guess the latter. In that case as others have suggested, use a little polish.

I don't know what the eastman finish is, but it looks like some sort of varnish. maybe a little wax will knock off the ashiness?

[29er]

Originally Posted by Taylor Ham

two possibilities: there's more residue, or no residue and the finish itself has been affected.

if the area is smooth and dry to the touch after wiping, i'd guess the latter. In that case as others have suggested, use a little polish.

I don't know what the eastman finish is, but it looks like some sort of varnish. maybe a little wax will knock off the ashiness?

I think you are correct and the finish has been affected by the glue. You can't feel any difference between the residue area and the non affected finish. I can live with it but don't want to make things worse by using the wrong product/technique.

[29er]

Originally Posted by John Arnold

Polishing compound and a cotton cloth. I like Mother's Mag and Aluminum Polish.

John,
I did get some Mother's Mag polish and it has pretty much done the trick. You can still see a bit of the residue but it's about 90% gone. Thanks for the tip!