DIY Undercoating

I live in the Midwest where rust protection is really important. I just ordered a few gallons of Woolwax Creep N’ Crawl (cavity wax) to coat the underside of my Tacoma. I plan to apply it everywhere I can that makes sense. I think I remember someone posting a figure that shows the location of all the sensors on the truck? Can anyone help me find it? I want to make sure I don’t accidentally spray them.

Also, does anyone know the part number for the drain plugs show below?

 

09606 seems to be the last five of the part number as per your picture. Look at the plug for the first five digits.

 

There is a YouTube video from Nick Meyer about spraying boiled linseed oil on all exposed metal underneath for beach driving on the texas coast. Works great, just wipe it off stuff you don't want coated.

 

I'm going to try the creep and crawl for my truck too. Very excited