I am in the middle of doing a detail on the truck and tomorrow monrning I will be putting on some #21 followed by # 26 and I want to do more then 1 coat of #26 since my truck lives outside.

Is there any wait time before applying a second coat of # 26?

 

Personally, I like to give any LSP some time to cure between coats and let any solvents/carriers dissipate. (Zaino and ZFX is an exception)

I would give it a few hours if you can. In the end, it's not that critical either way, as you are not adding a complete coat the second time around anyway. More or less, you are just insuring complete coverage.

 

I have a question for the OP....how long did you wait to put the 26 on after the 21?