Welding my rusted frame

[flash66@xxxx]

I thoroughly inspected my frame today. It seems that the only 
rust "eaten" spot on the frame luckily is my front crossmember. As I 
started to chip away the epoxy I noticed a small indention in the 
metal. 
After a few blows with a hammer to check the integrity of the area , 
I made a nice gaping hole in the weak area. What I plan to do is cut 
a rectangle piece out of the bottom of the crossmember out between 
the two holes on each side of the bottom plate, treat the rust with 
acid ,
cover the entire section in and out with Truck bedliner spray (rhino 
liner) ((now availiable in a spray can.. perfect for the job )) and 
weld a new piece of 16 guage steel plate to the cut out area. My 
question to the group is ... 
I am a little worried about using my air cut-off wheel tool and mig 
in this area since the fuel tank is right behind this member. Sparks 
will be a flyin. I think it will be fine to do since there is a 
barrier of the back of the member between where im cutting and the 
fuel tank. But I just wanted a second opinion before I start cutting. 
I Don't really feel like blowing up this weekend (laugh) . Any 
comments would be appreciated.
-Paul #16811