Is there any concern on breathing the smoke and fumes when welding cold rolled steel? I haven't been able to find a mask that will fit under my Lincoln helmet.

Here is a picture with a better polish. Mfg settings and 1/2" stickout. I have looked at Jody's videos and will keep adjusting.
Thanks

Still waiting on my finer abrasives. I welded some more T joints with 11ga. Lincoln 215MP .030 using Mfg. settings and I can still sometimes make out some straight lines in the cross section cut. I increased the wire feed and left the voltage the same at 19 but it still looks like I need to get the ...

Thanks. I will get some better grit and polish.

I am very new and am practicing MIG welds. Using mfg settings on 11 ga and the weld looks ok but when I slice it open I see cracks. Looks like a cold weld but I am very inexperienced. Any help would be appreciated.
Pete