[Swagman105 (Geoff)]

I have just bought quite cheaply a second hand Vixen 80D 720F refractor which had obviously been languishing in a garage for many years. I have cleaned it up quite a bit but there are some marks on the objective which I cannot remove. The telescope seems to work quite well as it is but the marks annoy me aesthetically and I don't want to risk causing any damage to the lens by trying to clean with too much force.
I am worried that the marks are actually damage to the coating caused by insect excretions (flies, spiders etc ) that may have etched the surface coatings.
I have been told that the telescope although old (90's vintage) is almost identical to the modern vixen and is a fine instrument so I wouldn't mind spending a bit of money to professionally clean or even if necessary re coat the lens.
I would be open to suggestions on this.