Goo-B-Gone should remove the smears. A little goes a long way. One of the applications for removing vehicle emblems is to saturate the adhesive. The chemical seeps into the adhesive and makes it easy to remove. I say that with caution. Use a micro-fiber cloth with the Goo-B-Gone on the cloth and apply gently and NOT liberally.
I would also think that some of the polishes on the market would remove a smear.
And, have you called Keystone to ask what there advice is for removing it, since they were the ones that put it on there?
Edited: I agree that a plastic spatula or wood is better than a razor blade or putty knife but I would be very careful of any scraping method as there will still be a tendency to put scratch marks on the gel coat, depending on how vigorous a scrubbing is given.
Double Edit: This is from a search on the words:
cleaning calk smears
and brought up daimler chrysler page that can only be viewed in html instead of the document. (
https://gsp.extra.daimlerchrysler.co...pecs/07920.doc)
It states"
"4 CLEANING
1. Clean off excess sealants or sealant smears adjacent to joints as the Work progresses by methods and with cleaning materials approved in writing by manufacturers of joint sealants and of products in which joints occur."
If you do the search and view the page in HTML, you will see a very long list of sealants that manufacturers use. It is the manufacturer of the sealant that needs to provide the information on cleaning their sealant.
I know I have not been much help, but I'm just trying to provide information for a decision that you have to make.
Good luck.
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