What Grit Should I Use on Resin Scratches?

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Smoothing out scratches on resin surfaces, especially on boats, requires the right approach and materials. Selecting the proper sanding grit can make all the difference to a seamless, glass-like finish without causing further damage.

Choosing the Correct Grit Sequence

Start by using a fine grit pad – typically, 1000 to 2000 is ideal for removing light scratches on resin. This level gently abrades away superficial marks without introducing deep swirls. Once most scratches are removed, switch to an ultra-fine 4000 grit pad to refine the surface and prepare it for final polishing. Avoid starting with rougher grits unless tackling deeper imperfections.

Begin with 1000–2000 grit for most resin scratches
Finish with 4000 grit for a smooth surface
Work progressively without skipping grits for the best result

Sanding and Polishing Tools

Consistent results require not only the right grits but also proper tools. For smaller areas or curved boat sections, flexible sanding pads like the Ebonite Abralon Sanding Pads offer excellent control, available in grits up to 4000. After sanding, use a dedicated resin polishing compound such as Epoxy Polish with a buffer or hand pad for a mirror-like finish. Polishing by hand is possible, but a rotary polisher or pad holder ensures optimum shine and clarity.

When Grit Selection Matters

Choosing the right grit is especially important on visible surfaces where appearance is paramount, like the deck or hull of a resin boat. Using a grit that’s too coarse can leave marks, while skipping straight to very fine grits may fail to remove deeper scratches effectively. Always work gradually and, where possible, test on a small area first.

Related guides

How To Repair Small Resin Boat Scratches

By carefully selecting your sanding grits and using the right finishing techniques, your resin boat surface can be restored to a brilliant shine. For more on comprehensive resin scratch repair, see our main guide on how to repair small resin boat scratches.