We have access by faith into this grace wherein we stand, Romans 5:2.
Since we are made alive in Christ by the grace of God; and salvation is by grace through faith: I would say that faith is the catalyst for entering into grace; and therefore faith must always come first. It is the key to the door by which we enter into the place of blessing that is called grace. And of course, Jesus is the door.
If we enter in by Him, we shall be saved, and shall go in and out, and find pasture, John 10:9.
This idea that grace comes before faith is contrary to proper evangelism.
The sinner can say, grace comes first; therefore I do not even need faith: it is unnecessary for my salvation since I can have grace apart from faith: if grace comes before faith.
Therefore the doorway by which we enter in to salvation is deterred from; the person is told that God will arbitrarily save them by His predetermined choice and that faith is not a factor in this.
Again, if grace comes before faith in salvation, then faith isn't necessary; a person can have grace apart from faith.