Welding Info please

Hi all. I have a new project that requires a fair bit of welding and rust repairs. On You Tube it all looks so easy! I'm just after info on what everyone is using etc regards welding repairs, equipment, settings etc.  I'm using 1mm steel and butt welding with gasless. Using Mig. Have used all size wires but now use .6 flux core wire on the lowest welder settings. Still having trouble burning holes in the joins etc. Am I using the right size wire? Should I be using gas rather than gasless? Would like to know what all you experts are using etc. Thanking you Paul.

Thanks for that Marty. Just the info I was after. much appreciated.

Thanks guys

ok, yes I have to chime in if its not too late!
 
As a beginner too, I started with gasless flux core wire, much like yourself.
And to be honest, I've actually only used gas once, doing some volunteer welding to get my practice up, so in reality, I probably dont know any better.:) 
 
Don't forget, your wire isnt solid as it has flux in the core obviously, so ideally i'd suggest you'd have more chance with 0.8mm flux core, which is what i've used all along. 
 
Some things I wish I knew at the start:-
- gasless really splatters, so as said above make sure everythings clean, and spray it with anti splatter to make it easier to clean the beads off after. 
- protect your ears: I got a hot bead splatter down the ear hole when welding an exhaust upside down, its still not 100% and hurt more than down the socks.
- the easiest way to join a panel or patch is if you can make it oversize, and joggle an edge. Then you can drill holes in the 'main' part of the job and simply fill/plug  up the spots with your thicker metal, not the body. It's probably not 100% the expert way to go as you have double seams, but I think with seam sealer, it will outlast me and is safer than it was. Plus you can tack around the edges if you want also. Thats essentially how I welded bubble arches on.
- watch Fitzy on YT for his way of tacking patches and trimming them with a grinder as you go (or my build thread on the van). It helps misimise distortion and is quicker than trying to get a complex patch to she correctly. I did van windows this way.
- your repair patches at 1mm is going to be thicker than prob 90% of your panels, especially where they were stamped. And if its an Escort, that even thinner i reckon. So start any weld favouring the patch, putting less heat into the car if you can. If you blow through it will be from the bodywork, not the patch mostly.
- A really good tip I got from one of the members, was to angle the torch back, this helped my technique a great deal.
- I wipe down with wax and grease before welding, but dont leave your rag nearby like I did.
 
And post up whatever you are doing. There are some very helpful people who can weld way better than myself who have tought me alot.
A boilermaker told me, the best way to learn is to burn wire.