Dangerous to weld with undercoating?

[tl75keith]

Hey guys,
I'm thinking of having full-length subframe connectors welded onto my car but it was undercoated. Is there any danger welding onto undercoated metal? Thanks

 

[fr96ss]

weld

The undercoating gets grinded off befor the subs get welded it

 

[Gearbanger 101]

Of fire you mean....nah, but clean the area really well before you weld. It's pop and sputter and leave the most god awful bubble gum mess if it's not a clean bare metal surface. Other than that, it just stinks up the car if you don't.