Depends what you mean by "safely." The FAA will care about the arrest, and your BAC. If you can flawlessly perform the FST, you might avoid the arrest altogether.
There is no "flawlessly". Those FSTs are meant for you to fail by design.
FST's are ANY test the officer performs in the field for the establishment of probable cause. The ONLY purpose of FSTs is for the officer to gather sufficient probable cause to arrest. Because of the 5th Amendment right against self incrimination, they cannot legally impose consequences for refusing them. So why would you voluntarily give any officer probable cause to arrest?
Now...the argument is "Well if you refuse the FSTs, he's just going to arrest you anyway." He's going to arrest you regardless, even though legally he's not allowed to without probable cause (refusal of the FSTs is insufficient to establish probable cause on its own). The goal isn't to avoid arrest. The goal is to establish a case you can successfully have dismissed, and then file a lawsuit against the arresting agency's governing body (city/county/state). This gives you a leg to stand on to fight the arrest.
The long and short...from the very first question the officer asks ("How are you doing tonight?" "Where you headed to/coming from?" "Do you know why I stopped you?", etc), inform the officer "I'm sorry officer, but I don't answer questions without my lawyer present. I hereby refuse any searches of my vehicle. I wish to exercise my right to remain silent." From that point on, you say nothing. NOT...ONE...WORD.
Now...he can order you to step out of the vehicle (Pennsylvania v. Mimms). He can also perform a limited pat-down for weapons if they have
reasonable suspicion that a person is armed and dangerous (Terry v. Ohio). Let him say whatever he wants. "I smell alcohol/marijuana/whatever"...YOU SAY NOTHING! You've already verbally invoked your 5th Amendment right to remain silent.
Yes the cop may be ****ed. Yes the cop may arrest you. Yada yada yada. He may even intimidate you. Or play the classic "Look I'm just trying to help you", "Help me help you", "I'm just doing my job", "If you don't cooperate I'll...", "I can arrest you for obstruction", etc. Don't buy it (for the record he can't get you for obstruction solely for exercising your rights).
But doing these things is going to give you the ammo to get the whole entire thing dismissed. The judge will find no probable cause. Then you can turn around and sue the **** out of the city/county/state that governs the arresting agency. They can argue qualified immunity all they want. Qualified immunity goes out the window for arrests with no probable cause (5th Circuit Court of Appeals, De La Cruz v. Robinson, which is based on SCOTUS ruling in Malley v. Briggs).
Now...if you are arrested, you will be given the opportunity to conduct a blood, breath, or urine chemical test at the station. Refusal of this test violates implied consent law. This is what the FAA will be looking at. Do this test, this test only, and nothing else.
Bottom line...the goal isn't to avoid arrest. The goal is to establish a case you can successfully have dismissed, and then file a lawsuit against the arresting agency's governing body (city/county/state).