How to clean paint off of varnish

[Skipper]

I didn't spill any paint, but rather a much more unanticipated anomaly has occurred.

My companionway sill is topped with a fabulous, thick piece of teak that has 8 coats of stunning varnish on it. I have been setting a portable air conditioner on for 2 summers, with a towel between to keep off the scratches. So, I used a different towel this last weekend, a beige-colored one. Well, the beige color transferred in waves to the varnish, I'm guessing due to the heat.

So, How do I get paint, dye, foreign color off the varnish?

 

[Charlie Jones s/v Tehani]

I would suspect you'll need to lightly sand that top coat of varnish, and apply a new coat, or two.

Besides- any coat of varnish is just the next to last coat