Not done any clear coating before. I belive its Very hard to get perfect Finnish straight off the gun.

What is the process to clear coating? How many coats / drying time / wet sanding after? / polishing?

And could it all be run off a portable compressor or electric guns? 

Thanks 

It isn't any more difficult than any other skill you need to learn. I'd recommend looking on YouTube for videos made by 'The Gunman'. They aren't super straight forward tutorials like Easy Composites, but he does show you all the basics and then just has hundreds of videos of respraying cars that you can watch and observe his technique and what the process is supposed to look like.

Your specific questions can't be answered by us, it depends on the material you are using. You need to go and find a clear coat (I'd recommend any high solids 2k automotive clear), and then read the technical data sheet for that specific product to find out things like number of coats, drying time and polishing.

Essentially no, it can't be done with portable compressors or electric spray guns - not with good results. Portable compressors are much too small. Ideally you need a big compressor with a high flow rate and decent sized tank. Realistically unless you are trying to spray things as large as a full vehicle or even multiple vehicle panels at once, then you can get away with using a smaller compressor (but still not a portable one). It will be annoying because the compressor will run the whole time you are spraying and if what you are spraying is too big and the compressor can't keep up then it will drop pressure and effect your paint job. But it works if you are patient and go slowly and don't try to paint large panels.