this post was submitted on 24 Oct 2025
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Cars - For Car Enthusiasts
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Yes, I know. That's exactly what I'm looking for. Why do you say that? Is the green one the kind that dries? I thought I read using translation that it uses lanolin as well.
Well I just learned something new. The term undercoating, to me, is the heavy black spray. I didn't realize this product (B'laster Surface Shield) could be used like this. I found a reddit thread where a guy sprayed the bottom of a truck and a year later he was impressed how well it lasted. Sounds like it would occasionally need to be re-coated. I have zero experience with the green can product, but it sure looks to be very similar.
Yes! The Repair Geek that I referred to also did experiments like that, keeping metal pieces in the elements outside, completely exposed, for up to 7 years I believe. The ones coated with Surface Shield were completely untouched, just dirty. The others did well too but the bare metal was almost gone. I don't even think he tried the ones that dry but he did explain why they are terrible in his opinion.
And yea, these that don't dry need a few recoats, Repair Geek on youtube recommends that too. But after a few coats it gets so thick that I think you don't need to do it anymore. And you only need a tiny amount for recoats, not another 3-4 cans as you do on the first coat.
I really hope this is the right stuff... I didn't get to investigate further but I will at some point and update the thread.