Join Date: Dec 2004
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I suspect that you are referring to a rubberised adhesive, like contact adhesive (i.e. spread on both surfaces, and when they come together after drying until tacky, even if they are misaligned - thats where they are staying!).
I had to remove this from my boat in order to replace the headlining. My local boat fabric shop sells a flap sanding wheel that fits on a drill that is designed for the removal of this adhesive, but the best way I found to do it was using a cup brass wire brush in a small angle driver, preferably not running at the highest speeds that some of these can run at. It is a very messy job, but providing you dont try to do too much at a time, the brass wire flicks the solid adhesive off the grp and it can then be hoovered up. If you try to do too much at once, it will melt the adhesive and make it difficult to remove, use too much force and it will start to wear a hole in the grp.
You must wear eye protection, full body coverage, and a really good mask