What to charge for oil stain on trex deck?

[Ian K.]

Tenants left this stain on an elevated trex deck.  How would you handle this?  I can see replacing the boards that are stained or is it possible to caculate the replacement cost of the full deck minus depreciation due to it being about 12 years old. The property is located in Colorado.  

[James Hamling]

Quote from @Jim K.:

Wait a minute, isn't Trex a composite material? Because if this is wood, you definitely need to do maintenance all over that deck.  Sand the thing down and hit it with Thompson's Water Seal.

If you definitely need to replace the stained area of a wood deck, @Bob Stevensis right, this is a two-board affair. But still, sand the whole thing down and do maintenance on it.

 NO, DONT SAND! It's TREX, composite decking, sanding it will destroy it!!!!

It CAN be cleaned via a degreasing agent. And it CAN be oiled, JUST oil, no clear coat, sealant coat, none of that that's why I use Ipe Oil ( a little trick). 

With composite, it's petroleum based (plastic) and it does loose oil over time. Depending on age and weathering, using JUST oil can rejuvenate it and extend life. I have known some to use cooking oil but for me that's just too weird, I use Ipe. Age, material decay, all factors in to what results a person will get.