I have just got this off my shelf in the workshop to use,

I recently bought some new ,

now putting the bottles together the older one on the right looks a totally different colour to the new one,

Both of the bottles are unopened,

I keep them up on a shelf in the dark ,

What i want to know Is it still ok to use or not ??

Dont want to waste a lot of carbon and kevlar,

Any views on this ,

Thanks in advance.