WD40 is fish oil, not mineral, at least originally. Neither is lemon oil afaik, unless you have a reliable source? 
 
What polish? The stuff on your shoes? 
 
I tried the Ernie Ball wonder wipes the other day, one for the fretboard, one for the body/finished parts, one for strings. Worked fine but didn't last long. 
 
In the end what works for you, works.