Go to
http://www.zainostore.com/ and call them for their advice. I've been using their products for years and think they are superior. My guess is they will tell you to wash the car with a mild mix of Dawn detergent and then apply Z2 with accelerator or Z5 depending on the color and condition of your paint. Of course you can just try to wash with car wash first to see if the sap comes off. It comes right off my cars but they've all been "Zaino'd" quite a few times. If it's on the convertible top check out this product.
http://www.properautocare.com/ravicotopcak.html
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