But in real life, no, dont be worry. since the amount of second layer paint being sprayed onto it is pretty small, and the underneath layer is already fully cured; the amount of time the thinner/solvent of the upper layer needed to melt the paint underneath it is too long; before the melting even start, majority of the thinner on the upper layer is already vaporised.

Besides that, once the paint land onto the surface, it's not being moved anymore. So even a little bit of "melting" does happened, we wont even notice it.

Do an experiment- spray black. then spray silver. now while the silver still wet, use your finger totouch the silver paint. u will realised not only u will screw up the silver paint, but the black paint below will also be damaged. This explain what i said just now.
As for clear red paint, u gotta be extra caution.

Eg, if u spray black, then on top u spray blue. Even though the blue paint on top melt the black at the bottom, since 1. it's minimal, 2.u r not touching it, 3. the to most top of the blue paint isn't been disturbed, even though there r some melting n jumble up of blue n black beneath it, we still cannot see; because the blue paint is opaque (not transparent)

However, for clear color; since it's translucent/transparent, we can see through it down to the bottom of that layer, any jumble up or melting will be visible. This explain why sometimes when we spray silver n clear paint on top of it, even though the surface of the clear paint is good, we still can see some funny funny pattern occurs. This occurs "when the clear paint reacts with the paint below n since the clear paint has no ability to cover anything, hence our eyes can see.

i suggest, make sure the silver paint is fully cured before you spray the clear red. Wait at least 36 hours to be safe. Second, try not to add any retarder, which will slow down the drying time of the clear red/ the vaporizing of the thinner in the clear red. This will give the thinner in the clear red has more time to "kacau" the silver.