Unknown Lego damage

Talantus

Hey everyone, 

I recently aquired a a Classic Space baseplate and I immediately noticed yellow spots on it. Can anyone help me identify this damage and how it can be "reversed"? 


*sorry I'm new to the whole forum thing, didn't know where this would go*

TheMaker37

If it is just the normal yellowing that occurs due to smoke or sunlight damage you can remove it by immersing it in hydrogen peroxide and place outside in the sunlight for a day. But judging by the picture it may be something else, but that could just be that the picture makes the stain look different?

JudgeChuck

Given the location of the stain and its form, those look to be at least partially stress-induced to me. I'm not sure how you'd go about fixing that.
It doesn't look like normal sunlight yellowing, which could be fixed with the hydrogen peroxide method.

Bumblepants

This thread is the one that holds the answers you seek: http://bricksetforum.com/discussion/497/brick-discoloration-due-to-sunlight-smoking-and-methods-to-restore

MAGNINOMINISUMBRA

I'm entirely with Judgechuck on this one! I've got a crater plate with that weird yellowish mark in almost exactly the same part of the crater rim ( and also in the highest point of the peak) that I can personally confirm was caused entirely by stress on those points due to having a weighty drawer stacked on it for around a decade! My plate was stored in a darkened, smoke free environment the whole time. I CAN confirm that it spent probably the first twenty years of its life exposed sporadically to tobacco smoke and can also confirm that attempts to renovate it only caused the stain to appear more prominent.

madforLEGO

MAGNINOMINISUMBRA said:

I'm entirely with Judgechuck on this one! I've got a crater plate with that weird yellowish mark in almost exactly the same part of the crater rim ( and also in the highest point of the peak) that I can personally confirm was caused entirely by stress on those points due to having a weighty drawer stacked on it for around a decade! My plate was stored in a darkened, smoke free environment the whole time. I CAN confirm that it spent probably the first twenty years of its life exposed sporadically to tobacco smoke and can also confirm that attempts to renovate it only caused the stain to appear more prominent.

Yeah guessing a combination of stress marks and plastic discoloration. I would say that it is now good as a 'filler' type base plate for a MOC display but for a set I would just buy one in better condition, even at the cost they are now, just to ensure the set is in 'good condition'.

Talantus

Many thanks to everyone for their input, I will just have to buy a replacement in order to complete #926