Scale multiple objects and appling the scale to all of them

Hi. I am dealing with a big collection of objects (car model) and I would like to scale all the objects and apply the scale to all of them in one go. Is that possible ? There is an old script to do that, but does not work anymore in Blender 2.8X. I am wondering if there is any workaround it.

Thank you

Did you mean you have dozens of cars in a file?

No. I mean one car, I apologize for bringing confusion. I mean one car with many layers/meshes in the outliner. Do you know if this is possible without doing it manually one by one.

You mean so they scale “in place” right? Does this help?

individual-or

select everything, scale pivot around median point and apply scale.
when you click “apply scale” to all your selected mesh it will reset all of their scales to 1.1.1
or use this addon Auto Apply Transform to do it automatically.