Technical Question: Polyester Resin Car Body Filler

[Hermes2020]

I have an idea for a (very abstract) sculpture of a dancer, derived from spheres that are fused together using a metaball algorithm. Since it will be life size or bigger, and because of the shape, my usual concrete will not be practical. I am thinking of using aluminium strips combined with car body filler in some parts. I would prefer not to paint the filler. Has anyone here had experience with the durability of unpainted body filler out of doors? Any comments or suggestions would be appreciated.

 

[Enyaw]

I can't help but perhaps you could phone a body shop and ask them ..

 

[Triduana]

From an automotive point of view I know that filler isn't waterproof - it absorbs and holds moisture, so on a car it needs painting as it can affect the metal around it and cause it to rust. I don't know if that is useful to you though!

 

[Hermes2020]

Thank you, guys. I spoke to an expert in car matters yesterday and he told me the same things. It seems I will have to consider a paint layer, but that's OK.