I'm going to just say it how it is......
There is only ONE SHELLAC!!!!
And it is made by CND, not CCO or Bluesky or Blowfly or ABC or CBN anybody else but CND!!!!
If anybody buys any kind of SHELLAC from fleabay, amazon etc and the brand says anything different from CND SHELLAC, then you are NOT buying TRUE SHELLAC and the TRUE SHELLAC should ONLY be purchased from authorised distributors in your home town/country.
I consider it a sham if anybody who calls themselves a professional tech was to use anything but the true CND SHELLAC on clients. Your clients are paying for a professional service of CND Shellac and that is what they deserve....not Bluesky Shellac or CCO Shellac etc, these are NOT true Shellac.
It's been said a trillion times before and will obviously have to be said a trillion times more......there is only ONE TRUE CND SHELLAC and NO other product that uses the word SHELLAC is the real deal.
So in regards to your question of this CCO Shellac, stay clear of it for yours and your clients sake PLEEEEEEEEEASE.
I agree, you have used 2 of the top brands of gel polish and if both were disasters, you might have to look at your application and maybe further training in a reputable brand/company.
So if you have used both CND Shellac and Gelish, did you purchase the correct CND UV Lamp and then the correct lamp for the Gelish System or are you using a generic UV lamp for both products??
If you are using a generic UV lamp for both products, then this is one of your first big problems as to why it's not working for you.
And I will agree with Annie, if you have bought your Shellac from Fleabay or Amazon etc, then it's very likely that you have not got true CND Shellac and this is why it's so thick and gloopy.
Only you know the truth to these questions of where you bought it, what type of lamp you are using etc and if you are not using the entire system for each brand and you purchased them from not so good places, then it's inevitable that you will run into problems I'm sorry to say.
Sorry if I sound blunt but what I am saying is the truth.