Are there any areas to avoid when welding the inside of the van? My first time welding I had a small fire, but luckily put it out. My fault for having flammables around when the sparks were around. But now I'm petrified of fires. I'm thinking what if I weld the floor near the fuel line or will it be too close to the fuel container??? I don't have a lot to weld, pretty small holes, but need doing.