GOLDSUN Waterproof Sandpaper 60#–2000# Silicon Carbide Wet and Dry Automotive Sanding Paper

GOLDSUN Silicon Carbide Waterproof Sandpaper is designed for automotive refinishing, body repair, primer sanding, paint preparation, clearcoat finishing, and general hand-sanding applications.

With a standard 230 × 280 mm sheet size and a complete 60#–2000# grit range, the product covers coarse shaping, intermediate leveling, fine surface preparation, and polishing preparation.

For distributors and repair shops, the complete grit range makes it possible to build a practical sanding-paper assortment around different repair stages rather than relying on a single-purpose abrasive.

Product Highlights

60#–2000# Complete Grit Selection

Available grits:

60# / 80# / 150# / 240# / 320# / 400# / 600# / 800# / 1000# / 1500# / 2000#

This range supports different operations from aggressive filler removal to fine clearcoat sanding.

Wet & Dry Sanding

The paper can be used for either dry sanding or suitable wet-sanding processes.

Wet sanding can help:

• Reduce abrasive clogging
• Carry away sanding residue
• Reduce some airborne sanding dust
• Improve control during fine sanding

230 × 280 mm Standard Sheet

The large sheet format can be used directly, folded, cut into smaller sections, or combined with a hand sanding block.

Suitable for Automotive Repair

Designed around common automotive refinishing operations including:

• Body filler sanding
• Primer/surfacer sanding
• Old paint preparation
• Local repair
• Pre-paint surface preparation
• Fine clearcoat sanding
• Polishing preparation

One Sandpaper Range for Multiple Repair Stages

A workshop may need several abrasive grades during a single repair.

GOLDSUN provides a continuous grit selection to help operators progress from rough shaping to fine finishing.

Coarse → Intermediate → Fine → Ultra-Fine

60#/80# → 150#/240# → 320#/400#/600# → 800#/1000#/1500#/2000#

This progressive approach helps reduce the risk of leaving deep sanding marks underneath finer surface preparation.

3. Automotive Body Filler Sanding

Body filler often requires several sanding stages.

Initial Shaping

60# / 80# / 150#

Used when relatively large amounts of filler need to be removed or shaped.

Leveling

150# / 240#

Used to refine the filler surface and reduce the deeper scratches created during initial shaping.

Final Filler Refinement

240# / 320#

Used to further smooth the repaired area before primer or surfacer application.

For large repairs, operators can progress through several grades rather than moving directly from coarse to very fine paper.

Primer and Surfacer Sanding

After body filler repair and primer application, the surface needs to be leveled before the color coat.

Common choices include:

• 320# — earlier-stage refinement
• 400# — general primer/surfacer sanding
• 600# — finer surface preparation
• 800# — fine transition and preparation where required

The exact grit should follow the paint manufacturer's recommended sanding system.

5. Fine Sanding Before Painting

Silver, metallic, pearl, and other appearance-sensitive colors can reveal sanding marks or surface irregularities.

For fine preparation:

600# → 800# → 1000#

may be selected according to the coating system and repair requirement.

The objective is to create a sufficiently smooth and uniform substrate without unnecessarily removing material.

Clearcoat Sanding and Polishing Preparation

Fine GOLDSUN grits can also be used for suitable clearcoat finishing operations.

1000#

For fine local sanding and selected surface defects.

1500#

For finer clearcoat surface refinement and polishing preparation.

2000#

For ultra-fine sanding before polishing where the clearcoat system permits it.

Operators should confirm that the clearcoat is adequately cured and has sufficient film thickness before sanding.

Wet Sanding for Cleaner Fine-Finishing Work

Wet sanding can be particularly useful when working with finer grits.

Water can help carry sanding residue away from the working surface and may reduce abrasive loading.

A practical process is:

Select grit → Wet the paper → Wet/prepare the surface → Sand evenly → Remove slurry → Inspect → Progress to finer grit

After wet sanding, the repaired area must be thoroughly cleaned and dried before applying another coating.

Dry Sanding for Convenient Workshop Preparation

Dry sanding remains practical when the process requires a clean and simple setup.

It can be useful for:

• Body filler
• Primer
• Surfacer
• General surface leveling
• Local repair
• Areas where water should not be introduced

The choice between wet and dry sanding should depend on the substrate, coating system, repair stage, and workshop process.

230 × 280 mm Sheet — Flexible for Hand Sanding

The 230 × 280 mm format gives operators flexibility during localized repair.

The sheet can be:

• Used full-size for larger panels
• Folded for hand control
• Cut into smaller pieces
• Wrapped around a suitable sanding block
• Used around edges and curves

Hand sanding is particularly useful where machine sanding may be difficult to control, such as narrow repair areas, panel edges, curved sections, and blend zones.

Recommended Grit Selection

These are common process directions, not fixed sanding standards. Always follow the technical requirements of the coating system being used.

GOLDSUN Sandpaper for Distributors

For automotive refinishing distributors, a complete grit range provides more opportunities to supply the same workshop across multiple repair stages.

A distributor can stock:

• Coarse grades for filler repair
• Medium grades for primer sanding
• Fine grades for paint preparation
• Ultra-fine grades for clearcoat finishing

This allows the product range to cover both everyday body repair and finer finishing requirements.

Suitable B2B Customers

GOLDSUN waterproof sandpaper is suitable for:

Automotive Distributors

For wholesale supply to body shops and collision repair centers.

Body Shops

For daily filler, primer, paint preparation, and finishing operations.

Automotive Paint Stores

Can be supplied as part of a complete refinishing consumables range.

Hardware Distributors

Suitable for selected metal surface treatment and general hand sanding.

Woodworking Suppliers

Can be used for suitable woodworking and finishing applications.

Industrial Supply Companies

Suitable for general hand-sanding operations where the substrate and process are compatible.

Why Offer Multiple Grits?

A single grit cannot efficiently cover the complete repair process.

For example:

80# is appropriate for aggressive material removal but is too coarse for final paint preparation.

400# can provide finer primer sanding but is inefficient for removing a large amount of body filler.

1500#–2000# are suitable for very fine finishing but are not intended for initial filler shaping.

Therefore, a complete grit assortment allows the operator to match the abrasive to the specific repair stage.

Common Workshop Sanding Workflow

Step 1 — Identify the Surface

Determine whether the surface contains body filler, primer, old paint, clearcoat, or another material.

Step 2 — Select the Starting Grit

Use an appropriate coarse or medium grit based on the amount of material that needs to be removed.

Step 3 — Level the Surface

Sand evenly and avoid excessive pressure concentrated in one area.

Step 4 — Progress Through Grits

Move gradually toward finer grades to remove the previous sanding scratches.

Step 5 — Inspect the Surface

Check under suitable lighting for remaining scratches, low spots, uneven transitions, or surface contamination.

Step 6 — Perform Final Preparation

Use the grit required by the next coating or polishing process.

What Makes GOLDSUN Practical for B2B Supply?

Complete Grit Range

11 available grit grades cover coarse through ultra-fine applications.

Standard Sheet Format

230 × 280 mm is convenient for workshops and manual sanding.

Wet and Dry Capability

Supports different workshop sanding methods.

Automotive-Focused Applications

Suitable for body filler, primer, paint preparation, and selected clearcoat finishing.

Bulk Packaging

100 sheets per book and 10 books per carton provide a standardized wholesale packing format.

Multiple Application Markets

Besides automotive refinishing, the product can serve selected hardware, woodworking, and industrial sanding requirements.

Product Specification

Packaging Details

Actual shipment dimensions and weights may vary by production batch.

Buyer Ordering Checklist

Before placing a wholesale order, buyers can confirm:

• Required grit assortment
• Preferred sheet size
• Quantity per grit
• 100-sheet book packing
• 10-book carton packing
• Private-label or standard packaging requirements, if applicable
• Intended application: automotive, hardware, woodworking, or industrial
• Wet, dry, or both sanding processes

For automotive distributors, selecting several complementary grits is generally more practical than stocking only one grade.

Key Selling Points

8 Frequently Asked Questions

Is GOLDSUN sandpaper suitable for automotive body repair?

Yes. The grit range covers common automotive sanding operations including body filler shaping, primer/surfacer sanding, paint preparation, local repair, and fine finishing.

What is the available grit range?

The available grades are 60#, 80#, 150#, 240#, 320#, 400#, 600#, 800#, 1000#, 1500#, and 2000#.

Which grit is suitable for body filler?

60#–80# can be used for coarse shaping, while 150#–240# are commonly used for leveling and 240#–320# for finer filler preparation.

Which grit should I use before automotive painting?

Common choices include 400#, 600#, and 800#, depending on the primer, substrate, color system, and manufacturer's recommended preparation process.

Can the sandpaper be used with water?

Yes. GOLDSUN is designed for wet and dry sanding. For wet sanding, make sure the substrate and coating system are suitable for water-based sanding.

Can 2000# be used for polishing preparation?

Yes. 2000# is a fine grade suitable for selected clearcoat sanding and polishing preparation when the clearcoat has sufficient cure and film thickness.

How many sheets are packed in one carton?

The standard packing is 100 sheets per book, 10 books per carton, or 1000 sheets per carton.

What sheet size is available?

The standard sheet size is 230 × 280 mm. It can be used full-size or cut into smaller pieces according to the sanding operation.