title_body: 30 year old water-slide decals. Are they still usable?
upvoted_answer: It's probably safe to assume that they will no longer work. This source suggests that water-slide decals have shelf life of about 3 years. &quot;After a few years the glue holding the decal onto the paper breaks down, fusing decal and paper together.&quot;
  Because there is some variation between different decals from different manufacturers, they may last slightly shorter or longer than that in storage (like 3-5 years), but 30 years is probably too long. I think it's worth trying out one of the smaller decals just to be sure of whether it will work or not.