Gunpla Tutorial – Nub Marks & Mold Marks

Section #1 – Basic Tools

If you spend time reading the first two tutorials, you should have an idea of what the basic tools are for removing nub marksBut I will list them for you:

  • Pair of nippers (Mineshima)
  • Hobby knife (Olfa)
  • Set of files (Tamiya)
  • Set of sanding sticks (Wave)
  • Set of sanding sponge (3M)

These are the brands that I personally use and that I find have the best value for money.

Section #2 – Nub Marks

Nub mark is a piece of gate (plastic) that is left behind when you remove the part from the runer. Before you put the parts together, you should remove the nub marks completely. This is very basic but important since you’ll be spending most of your time removing nub marks and polishing parts.

  • Before and After Removing Nub Marks 01

    Before and After Removing Nub Marks 01

  • Before and After Removing Nub Marks 02

    Before and After Removing Nub Marks 02

  • Before and After Removing Nub Marks 03

    Before and After Removing Nub Marks 03

Here are the simple steps on removing nub marks:

  • Using either nipper or knife remove most of the nub mark until its barely visible. Use your finger or finger nails to feel the surface if there are any nub marks left.
  • Then you want to polish the surface until the nub marks are completely gone. You can do this using sanding sticks/sponges (depends on the surface you’re working on).
  • Start from lower grit and work your way to higher grit. Remember to let the sanding stick/sponge does its job so don’t put too much pressure (you might polish away some details).

Gunpla Beginners Handbook 1.0

Guide book for Gunpla Beginners.
Exclusive step-by-step Tutorials (HD Videos) and Bonus Technique inside brought to you by Gunpla Jagat Raya.

Section #3 – Mold Marks

Some parts come with a mold mark and just like nub marks they are easily removed using the proper tools. Using the same method as removing nub marks you can easily remove mold marks. The only difference is you need a knife to scrape the mold marks and then polish the surface.

Removing Mold Marks


For more detailed tutorials on nub marks and mold marks feel free to download my Gunpla Beginners Handbook 1.0 for free. Exclusive Video Tutorials available inside also a section on "Working on Small Parts".

Gunpla Beginners Handbook 1.0

Guide book for Gunpla Beginners.
Exclusive step-by-step Tutorials (HD Videos) and Bonus Technique inside brought to you by Gunpla Jagat Raya.

If you have any questions or topics you wanna ask you can post it bellow. Or simply send me an email. Cheers.

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