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What Grit Sandpaper For Resin What Grit Sandpaper For Resin

Tools & Equipment

What Grit Sandpaper For Resin

Written by: Henry Campbell

Discover the best grit sandpaper for resin with our comprehensive guide. Find the right tools and equipment for your resin projects. Unlock expert tips and recommendations!

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When it comes to crafting with resin, achieving a flawless, smooth finish is a top priority. Whether you are a seasoned resin artist or just starting out, the importance of using the right grit sandpaper cannot be overstated. In this comprehensive guide, we will delve into the world of grit sandpaper and its crucial role in perfecting resin projects. From understanding grit sizes to selecting the ideal sandpaper for resin, this article will equip you with the knowledge needed to elevate your resin crafting endeavors to new heights. So, let's embark on this journey to unravel the mysteries of grit sandpaper and discover the key to achieving impeccable resin finishes.


Key Takeaways:

  • Choose the right grit sandpaper for resin based on surface imperfections and resin type to achieve a flawless finish and streamline the crafting process.
  • Understanding grit sizes is crucial for refining resin surfaces with precision, from initial shaping with coarse grit to final polishing with extra fine grit sandpaper.

Understanding Grit Sandpaper


Before delving into the specifics of choosing the right grit sandpaper for resin, it is essential to understand the concept of grit in sandpaper. Grit refers to the number of abrasive particles per square inch of the sandpaper. The higher the grit number, the finer the abrasive particles and the smoother the sandpaper. Conversely, lower grit numbers indicate coarser sandpaper with larger abrasive particles.

Common grit sizes range from coarse to fine, typically categorized as follows:

  • Coarse Grit: Ranging from 40 to 60 grit, coarse sandpaper is ideal for heavy material removal and shaping tasks. It effectively smooths rough surfaces and eliminates imperfections.
  • Medium Grit: Falling within the 80 to 120 grit range, medium sandpaper is versatile, suitable for both material removal and surface smoothing. It strikes a balance between coarseness and smoothness.
  • Fine Grit: With grit sizes ranging from 150 to 240, fine sandpaper excels in refining surfaces, removing small imperfections, and preparing them for finishing touches.
  • Extra Fine Grit: This category includes sandpaper with grit sizes of 280 and above. Extra fine sandpaper is perfect for achieving a polished, flawless finish on surfaces, making it an essential tool for precision work.

Understanding the characteristics of different grit sizes is crucial in achieving the desired results when working with resin. The choice of grit sandpaper plays a pivotal role in preparing, refining, and perfecting resin surfaces, ultimately influencing the overall quality of the finished resin project.


Use 400-600 grit sandpaper for resin to remove any imperfections and create a smooth surface. Start with a lower grit and gradually move to a higher grit for best results.

Choosing the Right Grit Sandpaper for Resin


When it comes to resin crafting, selecting the appropriate grit sandpaper is instrumental in achieving a flawless and professional finish. The following considerations will guide you in choosing the right grit sandpaper for your resin projects:

Surface Preparation: Before sanding resin, it is crucial to assess the surface and determine the level of imperfections that need to be addressed. For initial shaping and removal of substantial imperfections, coarse grit sandpaper in the range of 40 to 80 grit is recommended. This coarse sandpaper effectively smooths rough edges and contours, preparing the resin surface for finer sanding.

Refinement and Smoothing: Once the initial shaping is complete, transitioning to medium grit sandpaper, typically ranging from 100 to 150 grit, is essential for refining the surface. This medium-grit sandpaper effectively removes scratches left by coarser sandpaper and further smoothens the resin surface, preparing it for the next stage of finishing.

Final Finishing: As the resin project nears completion, utilizing fine and extra fine grit sandpaper becomes paramount. Fine grit sandpaper, ranging from 180 to 240 grit, is ideal for removing minor imperfections and achieving a smooth, uniform surface. For the ultimate finishing touches and to attain a polished, flawless finish, employing extra fine grit sandpaper with a grit size of 280 or higher is recommended.

Consideration of Resin Type: The type of resin being used also influences the choice of grit sandpaper. Epoxy resin, for instance, may require a different sanding approach compared to polyester resin due to variations in hardness and curing properties. Understanding the specific characteristics of the resin being used is crucial in determining the most suitable grit sandpaper for achieving optimal results.

By carefully considering the surface condition, refinement needs, and resin type, you can select the appropriate grit sandpaper to elevate your resin projects to a professional standard. The right grit sandpaper not only ensures a flawless finish but also streamlines the overall resin crafting process, allowing you to unleash your creativity with confidence.




As we conclude our exploration of grit sandpaper for resin crafting, it is evident that the choice of sandpaper plays a pivotal role in achieving impeccable finishes and elevating resin projects to new heights. By understanding the nuances of grit sizes and their respective applications, resin artists and enthusiasts can effectively navigate the sanding process, refining resin surfaces with precision and finesse.

From the initial shaping and material removal with coarse grit sandpaper to the meticulous surface refinement and final polishing with fine and extra fine grits, each stage contributes to the overall quality and aesthetic appeal of the resin creation. Moreover, the consideration of resin type further refines the selection of grit sandpaper, ensuring compatibility and optimal results.

By embracing the knowledge shared in this guide, resin crafters can approach sanding with confidence, knowing that they are equipped with the insights needed to choose the right grit sandpaper for their specific projects. This empowers them to unleash their creativity, explore intricate designs, and produce resin artworks and functional pieces with a professional finish.

Ultimately, the journey of resin crafting is enriched by the mastery of grit sandpaper, transforming raw resin into stunning masterpieces that captivate the eye and touch the heart. As you embark on your next resin project, may the wisdom of grit sandpaper guide you in sculpting, refining, and perfecting your creations, bringing your artistic vision to life in every polished surface and exquisite detail.

Frequently Asked Questions about What Grit Sandpaper For Resin

What is the best grit sandpaper to use for smoothing resin?

The best grit sandpaper to use for smoothing resin is typically between 400 and 600 grit. This allows for effective smoothing without causing damage to the resin surface.
Can I use a lower grit sandpaper for resin?

Using a lower grit sandpaper, such as 200 grit, may be too rough for resin and could cause scratches or uneven surfaces. It’s best to stick to a higher grit sandpaper for resin to achieve a smooth finish.
How do I know when to switch to a higher grit sandpaper when sanding resin?

You should switch to a higher grit sandpaper when the surface of the resin starts to feel smoother and the scratches from the previous grit are no longer visible. This will help you achieve a finer finish.
Will using a higher grit sandpaper make my resin surface too smooth?

Using a higher grit sandpaper, such as 800 grit, can make the resin surface extremely smooth, which may be desirable for certain projects. However, be mindful that a very smooth surface may have difficulty adhering to certain coatings or paints.
Can I wet sand resin with sandpaper?

Yes, you can wet sand resin with sandpaper. Wet sanding can help prevent the sandpaper from clogging and also reduces the risk of overheating the resin, resulting in a smoother finish. Just be sure to use waterproof sandpaper and keep the surface wet while sanding.

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