{"product_id":"rock-tumbling-grit-stage-3-5-pre-polish-1000-grit-silicon-carbide","title":"Rock Tumbling Grit - Stage 3.5 Pre-Polish 1000 Grit - Silicon Carbide","description":"\u003cp\u003eOur \u003cstrong\u003e1,000 grit silicon carbide\u003c\/strong\u003e is a\u003cstrong\u003e Stage 3.5 pre-polish for rock tumbling\u003c\/strong\u003e, used after fine grit Stage 3 and before final polish Stage 4 to further refine the surface of the stones and prepare them for a brighter, cleaner finish. If you want rocks that are truly ready for polish, this is the stage that helps bridge the gap between smooth and glossy.\u003c\/p\u003e\n\u003cp\u003eA smooth stone is not always ready to polish well. Stage 3.5 is where the surface is refined enough for the final polish to do its job properly.\u003c\/p\u003e\n\u003ch3\u003eWhat Stage 3.5 Pre-Polish Does\u003c\/h3\u003e\n\u003cp\u003eStage 3.5 is the pre-polishing stage. This grit helps:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemove the very fine scratches left after Stage 3\u003c\/li\u003e\n\u003cli\u003eFurther refine the surface before final polish\u003c\/li\u003e\n\u003cli\u003eImprove smoothness and surface consistency\u003c\/li\u003e\n\u003cli\u003eHelp final polish produce a brighter, cleaner shine\u003c\/li\u003e\n\u003cli\u003eReduce the risk of haze or leftover marks showing through later\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis stage is what takes stones from finely smoothed to properly prepared for final polishing. If the earlier stages were done well, pre-polish helps maximize the final result. If they were rushed, scratches and defects can still carry through.\u003c\/p\u003e\n\u003ch3\u003eBest For\u003c\/h3\u003e\n\u003cp\u003eUse this pre-polish when you want to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMove on from Stage 3 to a better final finish\u003c\/li\u003e\n\u003cli\u003eRefine stones before Stage 4 polish\u003c\/li\u003e\n\u003cli\u003eImprove the quality of the final shine\u003c\/li\u003e\n\u003cli\u003eGet a cleaner, brighter polishing result\u003c\/li\u003e\n\u003cli\u003eAdd an extra finishing step for better-looking stones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot For\u003c\/h3\u003e\n\u003cp\u003eThis pre-polish is not for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInitial shaping of rough rock\u003c\/li\u003e\n\u003cli\u003eRemoving deep scratches or coarse grinding marks\u003c\/li\u003e\n\u003cli\u003eCorrecting pits, cracks, or sharp edges\u003c\/li\u003e\n\u003cli\u003eReplacing the earlier grit stages\u003c\/li\u003e\n\u003cli\u003eFinal polishing\u003c\/li\u003e\n\u003cli\u003eQuick shine improvement on poorly prepared stones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your rocks still show scratches, flat spots, pits, or surface damage, they usually need more time in the earlier stages before moving to pre-polish.\u003c\/p\u003e\n\u003ch3\u003eHow to Use It\u003c\/h3\u003e\n\u003cp\u003eFor most rotary tumbler batches:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMake sure the rocks are fully cleaned\u003c\/strong\u003e after the previous stage before starting pre-polish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClean the barrel thoroughly\u003c\/strong\u003e to avoid grit contamination\u003c\/li\u003e\n\u003cli\u003eFill the barrel \u003cstrong\u003eabout 2\/3 to 3\/4 full\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdd about\u003cstrong\u003e 1 tablespoon of grit per pound of rock\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdd water until it is\u003cstrong\u003e just visible among the top layer of stones\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eRun the batch, then inspect the stones before moving to final polish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBefore advancing, the rocks should be very smooth, evenly refined, and free from visible fine scratching.\u003c\/p\u003e\n\u003ch3\u003eHow Much Do You Need?\u003c\/h3\u003e\n\u003cp\u003eThe right size depends on how often you tumble and how many batches you run.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample - 2 oz\u003c\/strong\u003e: good for testing or very small batches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall Bottle - 8 oz\u003c\/strong\u003e: good starter size for occasional tumbling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium Bottle - 16 oz\u003c\/strong\u003e: a solid all-around size for regular hobby use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Tub - 32 oz \/ 3 lb\u003c\/strong\u003e: good value for frequent tumbling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulk Bag - 10 lb or 25 lb\u003c\/strong\u003e: ideal for heavy use, repeat batches, clubs, classrooms, or serious hobbyists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePre-polish is usually used in smaller amounts than the earlier grit stages, but it can make a big difference in the quality of the final shine.\u003c\/p\u003e\n\u003ch3\u003eWhy Pre-Polish Matters\u003c\/h3\u003e\n\u003cp\u003eStage 3.5 is what helps prepare stones for their best possible final finish.\u003c\/p\u003e\n\u003cp\u003eThis step is often considered optional but if you are looking for maximum shine after your polish step then consider this 1000 grit option.\u003c\/p\u003e","brand":"Rocks Canada","offers":[{"title":"Sample - 2 oz - 0.15 lb","offer_id":43753887334465,"sku":"RC-GRIT-1000SC-02OZ","price":5.95,"currency_code":"CAD","in_stock":true},{"title":"Small Bottle - 8 oz - 0.75 lb","offer_id":43753887367233,"sku":"RC-GRIT-1000SC-08OZ","price":16.95,"currency_code":"CAD","in_stock":true},{"title":"Medium Bottle - 16 oz - 1.5 lb","offer_id":43753887400001,"sku":"RC-GRIT-1000SC-16OZ","price":24.95,"currency_code":"CAD","in_stock":true},{"title":"Large Tub - 32 oz - 3 lb","offer_id":43753887432769,"sku":"RC-GRIT-1000SC-32OZ","price":41.95,"currency_code":"CAD","in_stock":true},{"title":"Bulk Bag - 10 lb","offer_id":43753887465537,"sku":"RC-GRIT-1000SC-10LB","price":101.95,"currency_code":"CAD","in_stock":true},{"title":"Bulk Bag - 25 lb","offer_id":43753887498305,"sku":"RC-GRIT-1000SC-25LB","price":229.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/6400\/9537\/files\/3lb_e00dfb50-bb6c-417d-9ae1-dec8be9b4a7b.png?v=1775684729","url":"https:\/\/rockscanada.ca\/products\/rock-tumbling-grit-stage-3-5-pre-polish-1000-grit-silicon-carbide","provider":"Rocks Canada by All-Star Telescope","version":"1.0","type":"link"}