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16 votes
Accepted

Remove 3, maybe 4, decades old PVA glue from Lego

Take it for what it is, I am not a material scientist and this is not a guarantee that the following information will work in your case. I believe your approach is correct, or at least as good as you'...
D M's user avatar
  • 959
13 votes

Remove 3, maybe 4, decades old PVA glue from Lego

Self-answer to let you all know how things went. Warm water was having some effect but it took forever. So Saturday morning I went to the DIY store and got myself a 5 liter jerrycan of white vinegar. ...
Tonny's user avatar
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6 votes
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Lego Duplo Train Track Switcher washable? / Best way to clean them?

According to this page it is glued together and can not be opened without damaging the part You are correct about it containing a metal spring I would just wipe it with a slighty wet towel
Syberion's user avatar
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6 votes
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How can I remove old LEGO bricks that are stuck together?

Try using this brick separator tool Source: https://shop.lego.com/en-US/Brick-Separator-630 A simpler version used to come with older sets. Some of the images demonstrate how the tool may be used ...
Goh SS's user avatar
  • 76
6 votes
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How to protect my LEGO city from the dust?

Where I'm from it's called Plexiglas. Other tradenames are Crylux, Acrylite, Lucite or Perspex... Anyway, you can get sheets of it cut to size in D.I.Y-shops or hardware stores to build your own domes....
Michael Verschaeve's user avatar
5 votes
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How can I stop bricks 'skating' over plates?

I suspect you are encountering an effect similar to what happens when stacking large plates together. 6x4 doesn’t seem particularly large but any area larger than 2x2 can be difficult to initially ...
Nathan Stohlmann's user avatar
4 votes
Accepted

Is it possible to sand/polish LEGO bricks?

It is definitely possible, since ABS is a plastic that can be either mechanically or chemically affected. Cleaning bricks is a well-studied field, you will find useful information regarding this topic ...
zovits's user avatar
  • 16.6k
4 votes

Restoring valuable minifigures

First off be very careful of the printing on the minifigure, the plastic is quite durable but the printing can wipe off rather easily. I list a few different methods to remove permanent marker all ...
David's user avatar
  • 1,357
4 votes

What kind of soap can I use to clean LEGO?

The official guidance from The LEGO group suggests using a mild detergent. Cleaning your LEGO® bricks is really easy! We recommend that you clean your LEGO® parts by hand using water no hotter than ...
Ambo100's user avatar
  • 17.6k
3 votes

Why are different ID informations printed in the inside of the same sort of bricks?

On newer pieces (maybe also the newest of the ones you show), there's a number identifying the mold and one identifying the position in the mold, allowing LEGO to trace a problem all the way back and ...
Henrik supports the community's user avatar
3 votes

How to remove printed decoration

I got good results using Soft Scrub with Bleach, an old towel, a Scotch-Brite scrubber sponge (the green and yellow one), a bottle brush, and a pile of Q-tips. Put a dollop of Soft Scrub on an old ...
Jodi Rehlander's user avatar
3 votes

How to remove printed decoration

I tried Eucalyptus Oil a found on some figures it worked very slowly and took a lot of rubbing, while on other figures it worked on very quickly. I don't know what the difference in the figures paint/...
George's user avatar
  • 31
3 votes

Cleaning Bricklink pieces bought as "new"

No. 10 out of 10 orders were in perfect condition. Cleaning the bricks would have been a waste of time, and would have added unneccessary scratches.
Metalbeard's user avatar
  • 2,595
2 votes

How to protect my LEGO city from the dust?

I know it is a bit simplistic, but you might try just using a light sheet. If it is a light, tight fabric, it probably will go on and off pretty easily. If you have lots of delicate parts on your ...
Thomas's user avatar
  • 233
2 votes

How can I remove old LEGO bricks that are stuck together?

(@emagar has done the editing asked by moderator) Leverage does the trick with no need for spacial separators or tools that might damage LEGO plastic. Use a long brick as lever, a smaller brick as ...
Kenny Lee's user avatar
2 votes

How to remove printed decoration

I used tea tree oil, it worked but tended to leve a ghost and if removed that would impair the plastics ability to reflect sunlight.
Don's user avatar
  • 21
2 votes

Is it safe to wash LEGO pieces in the dishwasher?

Front load washers should be fine with the regular bricks as long as you use the gentle cycle. ABS plastic is tough. As for dishwashers, they have heating elements that heat the water to a ...
Wol Bar's user avatar
  • 21
2 votes
Accepted

Is it possible to dismantle and refurbish an original 870 Technic motor?

Being very curious as a kid, I tried to disassemble one; from what I remember the cap where the plug goes in was sealed/glued quite firmly and not only was removing it a challenge; putting it back ...
Joubarc's user avatar
  • 21.2k
2 votes

Is it possible to dismantle and refurbish an original 870 Technic motor?

While it is important to keep old and rare Lego pieces in good condition; looking at the part in LDCAD, it does not look like there are any screws to take it to pieces, so I think it is internally ...
TechnicTechnician's user avatar
2 votes

How To Deal With Hydrogen Peroxide After De-Yellowing?

After doing a simple search, it seems that the general consensus is, it's okay to pour the used amount down the drain. Most of us get it. The stuff's been sitting in your house taking up space, ...
Rin Rio-Oki's user avatar
  • 8,893
2 votes
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Separating old 2 x 4 brick with wheel holder

I actually have one of these that comes apart easily (no idea where the internal tubes are). It appears that the glue that used to hold them together gave out. You can still see where it used to be, ...
Alexander O'Mara's user avatar
1 vote

Separating old 2 x 4 brick with wheel holder

I just went through the experience. My process: 01 - Boil water for 7mins. Bring water to a boil. ** EDIT by Kat. 02 - Toss LEGO in. 03 - Simmer for five minutes. 04 - With some tools find an ...
Rin Rio-Oki's user avatar
  • 8,893
1 vote

Restoring valuable minifigures

Try using window cleaner spray, like this: Such products are designed to remove nasty stains and their alcohol content should be able to loosen the permanent marker ink, since it is alcohol-based as ...
zovits's user avatar
  • 16.6k
1 vote
Accepted

Restoring valuable minifigures

I have had pretty good luck in the past using isopropyl alcohol and a q-tip.
JohnnyB's user avatar
  • 3,274
1 vote

Why are different ID informations printed in the inside of the same sort of bricks?

While we might not know all stories behind additional numbers it has been discovered that in later years LEGO use numbers to designate the mould they are using. With massive productions moulds tend to ...
Alex's user avatar
  • 23.2k
1 vote
Accepted

Why are different ID informations printed in the inside of the same sort of bricks?

Has to do with copyright patents of the brick design, and warding off general infringement. Other numbers. I don't know. Design references? Your (c) LEGO = © symbol, or the word 'Copyright' or ...
Rin Rio-Oki's user avatar
  • 8,893
1 vote

What is an effective way to clean clear LEGO bricks?

Almost all LEGO can be washed with dish soap and warm water (Do not use dish washer soap though, it sometimes contains grit to help grind off dried food. This will scratch your bricks) Second best ...
Roger Hill's user avatar
1 vote

How to clear off oils in a way that will not damage the plastic?

Your question is general, so I'll try to answer generally, but I'll use the pneumatic cylinder as an example since you mentioned it. If applicable, the first thing you'll want to do is break down the ...
jncraton's user avatar
  • 40.6k
1 vote

Does soaking Lego pieces in isopropyl alcohol discolor or otherwise damage them?

I realize this is old, but... I soaked a couple sticker-resin covered parts in isopropyl alcohol as an experiment years ago and the bricks turned mushy after several hours. So, that didn't work. ...
JohnnyB's user avatar
  • 41
1 vote

Does soaking Lego pieces in isopropyl alcohol discolor or otherwise damage them?

Washing LEGO ABS and Polycarbonate (PC is used for clear and colored transparent parts) bricks and parts can be done safely in a normal mixture of dishwashing liquid and clean water, preferably ...
Willem Koekebacker's user avatar

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