Ipe (Brazilian Walnut or Ironwood) has excellent resistance to penetration for standard lead rounds. It's super-dense and fire resistant. The process for InventWood seems like it is re-creating something similar.
Ipe is actually not attractive for exterior structures. The wood is so dense, stains don't penetrate. Many let it age to a grey/brown patina with annual cleaning and sanding. Inventwood would be a better alternative for exterior work if they have coloring options during the manufacturing process. For Ipe, staining is expensive and time consuming due to it has to be stained like cabinetry, with two passes.
Ipe is actually not attractive for exterior structures. The wood is so dense, stains don't penetrate. Many let it age to a grey/brown patina with annual cleaning and sanding. Inventwood would be a better alternative for exterior work if they have coloring options during the manufacturing process. For Ipe, staining is expensive and time consuming due to it has to be stained like cabinetry, with two passes.