Just be careful that you do not get liquid back to the compressor. It is going to be quite time consuming having to reclaim, adjust the TXV and then vac out and re-charge. Don't forget that every time you reclaim, you remove a small quantity of oil as well. So this will need to be added back into the system. If this is your car and time is not being paid for, then its up to you.
If it is a customers car and you are charging them for many hours work, then you best forewarn them to expect a large bill.
On the other hand, for a pre -1995 car, maybe you will just have to accept that the system is not quite as effective as it was before.