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I found this after googling - actually from a .doc on the Spectrum site:

Spectrum gel coat Patch paste is a factory color matched gel coat that is converted into a paste form that spreads like Vaseline, sets in approximately 30-40 minutes, and will stay in place on vertical and overhead surfaces.


HOW TO USE PATCH PASTE :
* Clean area thoroughly to remove oils and waxes. This should be done before sanding, using acetone diluted with 10% water. Use paper towels, changing often, to prevent contamination. CAUTION : acetone is highly flammable, use carefully. Dispose of paper towels properly.
* Rough and/or sand area to be repaired using course sandpaper, sharp instrument or small grinding tool such as a drill. The object is to get enough “tooth” to repair area to assure a good bond. Use a tag rag to remove dust, take care not to damage surrounding areas. Masking tape around the repair area will minimize this possibility.
* Place a small portion of patch paste in waxed paper cup and add M.E.K.P catalyst at approximately 12-15 drops per ounce of patch paste (2% by volume). Take care to mix thoroughly to assure an even surface and to minimize air entrapment.
* Using a Plastic putty knife or spreader, apply catalyzed mixture to gouge or scratch. Leave area slightly raised
* Let the repair cure thoroughly, normally 2-4 hours, or preferably overnight.
* Start sanding cured repair with 200x wet paper. Sand lightly, working your way down to a finer grit 400x to 600x wet paper. As you sand with finer and finer paper you will notice the shine starting to brighten.
* Buff and polish repair to achieve original shine

HINTS FOR BETTER REPAIRS
* Work at room temperature (75 degrees F)
* Heat repair area with a lamp or hair dryer. CAUTION : Be careful using electrical appliances around flammable materials. Elevating the temperature of a repair area will accelerate cure time.