This LoRA slider is trained on the concept of derelict versus pristine.

As usual with slider LoRAs, no keyword needed. You don't need to specify "decay" or anything else.
The recommended weights are -1.0 to 3.0.

I've tried to apply the effect on a specific item in the image but it seems that it's not possible, or maybe only with strong wording of the "immaculate" objects and low slider value.

Hope this helps someone create cool images.