Hi I'm using a sealey supermig 150/5 with a disposable co2 bottle and 0.6wire and I just can't seem to get anything like a consistant weld. I've tried its lowest setting and played around with wire speed and then on next highest setting and again played with wire speed and still the same. I didn't really want to go any higher with the settings as I'm working on an old car and didn't want to blow any more holes than I already am. I thought at first that it could be down to the fact I'm welding outside but even if I'm welding inside the car I'm getting the same results. Some weldslook great and seem to have good penetration but mostly they seem to be sitting on the surface and just pilling on top of each other or blowing through. The surfaces are good and clean, the earth clamps good and rust free and I've tried all sorts of wire speeds. Really struggling to get my head round what could be wrong. Would it be an idea to try gasless wire? Am I even able to do that with my welder? Please help point me in the right direction so I know what I'm doing wrong. Thanks in advance for any help.