Once your business credit is solidly built up, you can successfully apply for business credit cards and simply leave the personal guarantee section blank. When they run your Dun & Bradstreet and Experian Business credit report, if you have substantial business credit and a profile that has been built properly, your application will be approved - based only on your business credit with no personal guarantee.
In order to build your business credit up to where you will qualify for business credit cards, you will want to get approximately 15 business credit accounts (most of them revolving accounts), a full Dun & Bradstreet and Experian profile built, you'll want to get into the ratings system, and you'll need at least three revolving accounts with high credit limits. Obviously, you will also need to have paid your business bills on time and have close to an 80 Paydex score.