Covesjeep: I have several air bulb lense brushes and I would get one use it from above the lense surface and air puff the big pieces off of the lenses.
Then obtain real "lense tissue" (I am almost out of my beloved "Kodak" lense tissues!) and use some Zeiss lense cleaning solution (sparingly on the first cleansing. Then using very little Zeiss solution and a clean lense tissue clean the lense again - repeat for other lense.
I use this method on all new to me used Rifle scopes and spotting scope lenses.
Good luck with the new scope - it is obvious the previous owner did not use lense protection caps.
Hold into the wind
VarmintGuy
