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Hobby Sander: Perfect Tool For Cleaning Mold Lines on Miniatures

Clean plastic mold linesClean the mold lines on both plastic and resin miniatures easily with the Mr. Hobby polisher hobby sander, that’s perfect for Warhammer!

Let’s face it. Cleaning mold lines off miniatures is about as exciting as watching paint dry, but unlike that sweet layer of Agrax, you can’t skip this part. Mold lines are those annoying ridges that run across your Warhammer models, waiting to ruin your paint job the second you try to impress someone. 

Enter the Mr. Hobby polisher hobby sander, a tool designed to make cleaning mold lines on both plastic and resin miniatures quick, painless, and downright satisfying. It takes the grunt work out of prep and lets you get to the fun part of painting without sacrificing smooth surfaces or crisp detail.

If you’re serious about your models, this little gadget is the upgrade your hobby bench needs.

 

Hobby Sander: Say Hello to the Mr. Hobby Polisher 

Updated on October 12th, 2025, by Rob Baer with updated information and links.

Cordless Polisher ProAt first glance, the Mr. Hobby polisher might look like something you’d find next to toothpaste. Don’t be fooled. This thing isn’t for your gums; it’s a hobby sander built for plastic warriors and resin nightmares alike. It’s the best-kept secret for cleaning mold lines on miniatures, and honestly, it makes the whole ordeal a lot less miserable.

With new kits from Horus Heresy, 40k, and Warhammer: The Old World mixing plastic and resin, this tool is your one-stop mold line cleanup crew. Just don’t confuse it for your electric toothbrush unless you’re really committed to getting that Nurgle aesthetic.

How This Mini Sander Tool Works

Cordless Polisher ProThis isn’t your average sanding stick. The Mr. Hobby polisher is a cordless tool with a gentle oscillating head and replaceable sanding pads that come in multiple grits. It’s basically a small electric sander for crafts, built for precision without destroying your miniatures.

Rob gave it a test run by gently pressing the head against plastic minis. With just light pressure, the 1000-grit pad cleaned mold lines off smooth and fast.

Cleaning mold lines from resin? Same deal, swap to a lower grit, like 600, and it works like a charm on Forge World kits. No more scraping at your models like you’re peeling a potato.

Why This Mini Sander for Crafts Is a Game-Changer

hobby sanderMost tools either do too much or too little to remove mold lines. Standard files can chew into detail, and hobby knives are great until you slip and give your Primaris Captain an accidental battle scar. This crafting sander keeps things under control, giving you a clean finish without mangling the fine bits.

Is it perfect? Not quite. It struggles a bit with tight corners and recessed mold lines. But for 90% of the work, this small hand sander gets it done quickly and leaves your models with a high-quality, smooth finish, ready for primer.

For the tough spots, just fall back on your hobby knife. It’s still good for something.

Cleaning Mould Lines from Resin Without the Drama

Cordless Polisher ProForge World resin, we love you and your overcomplicated names, but your mold lines are another story. Cleaning mold lines from resin used to mean risking brittle breaks and frustration. With this small craft sander, the job gets easier. Use a softer grit, go slow, and you’ll be sanding smooth in no time.

Even those chunky bits of flash that usually require a chisel don’t stand a chance when the mini sander tool kicks in.

Best Practices for Mold Line Removal

Cordless Polisher Pro

  • Use light pressure: Don’t Hulk-smash your mini (it won’t make cleaning mold lines faster​). Let the tool do the work.
  • Start with 1000 grit for plastic: It’s gentle enough not to destroy detail.
  • Drop to 600 grit for resin: You’ll get more bite without causing damage.
  • Dry test your sanding pad: If it feels too aggressive, don’t use it on fine detail.
  • Tag in your hobby knife for tricky areas: This tool can’t reach everything, but it’ll cover the bulk.
GT07 Mr. Polisher Pro, GSI Mr. Hobby
  • Package Dimensions: 1.6 L x 10.5 H x 5.5 W (inches)
  • Package Weight : 1 pounds
  • Country of Origin : China

Last update on 2026-01-07 / Affiliate links / Images from Amazon Product Advertising API

The Final Verdict: Should You Get One?

Absolutely. If cleaning miniatures mold lines feels like the worst part of your build, this small power sander changes everything. It’s fast, clean, and makes your prep work feel less like a chore and more like progress.

The Mr. Hobby polisher is a solid win for anyone who’s tired of scraping mold lines by hand. It handles cleaning mold lines 40k style like a champ, whether you’re building resin dreadnoughts or Intercessors. Add this small electric sander for crafts to your toolkit and reclaim your time (and sanity).

Want one for yourself? You can grab the hobby sander here. Just don’t brush your teeth with it.

Click Here to Get Your Hobby Sander!

Have you used this yet for cleaning miniature mold lines? What is your favorite hobby tool to clean mold lines on plastic miniatures or models?
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