There are no guards at all on Lunar Colony. PASE doesn't have any money in the budget.
This is about 2/3 of the island quest. For the complete solution, see one of the related questions listed below.
You have to get a balloon.
with the camo suit
To enter the Rock lab, you need a keycard (dropped by Salerno when you find her) and purple eyes that you can get from the machine in the Research Lab.
4
There is no electric saw on Lunar Colony. To enter the Infirmary at the Research Lab, climb to the top and use the pressure chamber to temporarily squash you down, then quickly slip past the boxes that are blocking the door. The exit from the Infirmary is in the maintenance area.
give them money i guess
You have to dress like one of the guards to pass them, but you have to walk like regular people do.
get the invisible suit on and go past them
When you are wearing the Chameleon Suit, you are invisible when you stop moving. You can slip past the guards and dogs using it. (see related question) In the Bistro, you need a chef hat to get the wine glass. When you get it, slip past the guards by going through the kitchen vent and across the light fixtures.
When you get past the Black Widow's guards, then you will use it to enter her layer. Have fun! :-)
drink bleach, everyone knows that...