Treating trailer deck; UNDERNEATH

[Rvrrat14]

How many of you treat the wood of your deck on the underside? I was thinking of doing my new trailer and lifting with forks, blocking, and rolling the underside. Any suggestions or how-to’s to insure a safe work environment is appreciated. I’ve got some old 2 stroke oil, diesel, and used motor oil.
Thanks!

 

[John0829]

I use a mix of diesel and used oil in an old garden sprayer and while I may not get a perfect coating at least it is something.

 

[Rvrrat14]

I was able to lift tongue and place safety saw horses under tongue area, as well as drop tongue jack all the way down. Crawled underneath with roller/long handle/rough nap roller; Old Yamaha 2M 2-stroke oil/Diesel 50:50. Two coats top and bottom. It soaked up well.

 

[WinterDeere]

I'm in the process of replacing my trailer decking, switching from PT YP to white oak. I just picked up a gallon of Thompsons, with which I'll treat both sides and edges before installing.

I'd never use a water sealer on S4S YP, it'd be as slippery and dangerous as an ice rink. But I'm figuring the rough grain of rough-sawn white oak is going to offer enough grip to compensate the water seal.

If I'm wrong, no biggie. The clear stuff I'm applying usually only lasts 2 years or less on upward-facing horizontal surfaces.