What to use on my wood trailer floor?

[bigtoy]

I have a 5 X 12 flat bed trailer with 2" treated wood planks that are looking pretty rough because the trailer sits out doors. I was wondering what, if anything would be good to apply to these floor boards to protect and preserve them?

 

[MMeier]

You want to use BOILED linseed oil on it . Just get a roller brush and have at it ! Depending on access to the bottom, use the roller or use a pump sprayer, if using the sprayer, thin the oil 3 to 1 with some lacquer thinner. Used to do my 40' GN twice a year that way .

 

[bigtoy]

thanks for the reply!