An update on Dave's comment regarding newer boats - Nordic Tug is using teak veneered ply for the interior cabinetry and paneling, but the solid wood details are likely to be made from Sapele (Entandrophragma cylindricum), another African tropical hardwood.  Regardless, the "care and feeding" is identical and works wonderfully for both.   When we visited the factory in 2015 to see how they were installing their Amtico T&H floors on the new boats, NT told us they were using Sapele instead of solid teak.  So we used it for the new stair treads and transition thresholds on our Amtico install last year.  We found the grain color/pattern of Sapele almost identical to the adjacent teak paneling installed originally by NT, and the price a lot more reasonable.  Teak retails for well over $25-30 a board-foot.  Sapele is around $10 bf.  Raw Sapele tended to take a teak oil finish slightly darker than raw teak but with a little fudging on the teak oil tone, we got a finished color that was almost a perfect honey colored match to our 16 year old "aged" teak surfaces.  More detail for those who encounter this post on search, we found Sapele to be a very suitable and perhaps superior alternative to teak.  Other than tradition, and except for when I'm looking for its truly rot resistant properties, I don't think I will be using much teak going forward.  Sapele cut, machined, surfaced and sanded extremely well.  I found the dust from working and sanding the Sapele to be far less irritating to be around than I find teak dust to be.  There was little to no internal stresses to deal with and it has a less oily natural surface than raw teak.  As a result, we were able to use standard wood adhesives instead of resorting to urathanes and epoxies often required to adequately glue teak.  Because it's naturally less oily, I wonder if Sapele would retain its various finishes better than teak often does in exposed applications.  We sourced our Sapele from Crosscut Hardwoods in Seattle, they had an ample selection to sort through.  We did wander over to the teak rack just to compare the raw woods side by side.  It was remarkably close.  From inspecting Crosscut's inventory, it might appear quality teak logs are getting harder to source.  There was a lot more variation in the quality and consistency of the teak selection so it would have been more challenging to sort for the desired uniformity of grain/color from Crosscut's teak inventory than we were able to obtain from the Sapele.   Kelly BritzSandpiper, 37-042 Edmonds WA