Why do I have tacky spots after applying Amazing Clear Cast?

There are a few reasons why you might experience random tacky spots on a surface. The most common cause is scraping out the mixing container onto the surface. What results is that you unintentionally grabbing unmixed resin from the sides, bottom, and corners and depositing onto your surface which doesn't cure and remains tacky. If you have larger areas of tackiness, this is likely caused by either being off-ratio or more likely under-mixing. Part A is considerably thicker than side B. This makes mixing a bit more challenging due to the differences in viscosity (thickness). Users should commit a solid 3-5 minutes per batch mixing, ensuring to scrape sides, bottom, and stir stick off repeatedly while mixing. The larger the batch being mixed, the more time it will take you to adequately mix.
To fix tacky spots, first, make sure you give it up to 5 days to cure. If it's mixed slightly, it might simply cure more slowly. A warm room will also promote the resin curing faster. Heat guns will not be effective, as you need continual warmth, not intermittent heat. If tacky spots persist after this time period, you will have to re-coat the entire surface. Prior to doing this, we recommend taking a clean 100% cotton rag and generously apply acetone or alcohol to tacky areas. Make sure rag is fully saturated as to not transfer any lint or fibers from the rag into the resin. Rotate rag often and reapply solvent as necessary to remove tacky resin as good as you can. Once this is complete, lightly sand the entire surface removing some of the glossiness. After sanding, vacuum the surface with a vacuum and wipe the entire surface with a clean rag and solvent as described above. You are now ready to re-coat the surface.
Note: In some instances where epoxy is more than just tacky, more like gooey, the product must be scraped off with an instrument such as a putty knife in those areas prior to wiping with solvent.