Trunk Floor Spray ?

[71-SS350]

Currently in the process of replacing my rusted out Trunk floor on my '71 Chevelle. Using a 3 piece replacement floor and am wanting to use a spray in liner similar to what is used on truck bed steel floors. Is that a good idea, perhaps using Rustoleum floor spray or similar product? Anyone done such to somewhat mask or " hide " the welds as I replace the floor panels? Would also like to possibly use a black/gray spatter trunk paint afterwards. Covering the floor with a rubber mat or carpet is also a possibility. Need some thoughts and tips here, thanks.