information on my floor pan

[C_stripes]

Hey everyone.  I am going to sandblast my floors and weld up a stress crack and two little pin holes. What would you recommend to seal it up? Is POR-15 any good? Or should I prime and paint it? The floor is nice and solid but has some pits. I hear that por-15 will act a little as a sound deadner too? Any help would be great.     Thanks,  Jeremy

[mikepmcs]

No real substitute for cleaning and prepping the metal, smooth as needed and painting it.  Not saying those products don't work, but you run the risk of masking something.  I guess it really depends what your goal is. 
What you are saying would work I guess is my answer, but for how long I cannot answer.
I imagine it could be used as a sound diffuse as well.