Help! My paint is cracked!

Hi All: I could use some help in the paint department if you wouldn't mind. My 74 Duster came from the factory with JY9 Tahitian Gold paint, and was repainted once in 1988 in the same color. I've noticed some odd cracking on my trunk lid and hood - see photo. The rest of the paint is just fine. I've seen products advertised to make these cracks go away, usually a fluid that you rub into the crack. I don't want to repaint these areas, just looking for a cheap fix. Has anyone ever used a product that makes these cracks go away, something that you've used and can recommend? Thanks!

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