Leaving aside the whole question of whether or not to fine (in the main I agree with VBisGOD (except maybe for the name - VB isnt God)), cold and patience being the best answer.
PVPP in any of its many forms is NOT a fining. It chemically binds polyphenols removing them from the beer so they cant combine with proteins to form haze. The type of reaction is more analogous to that of activated carbon which can be engineered to adsorb (not absorb like a sponge) specific molecules and disregard others that are quite similar, a good example being in distilling where a well selected activated carbon will remove Propyl alcohol, Butyl alcohol and other higher alcohols (Fusels) but will let Ethanol alone (mostly). This is going on at a molecular level well below the size where we can see whats going on, through a process that involves hydrogen bonding.
Fining agents (gelatine, Isinglass) act on large structures like yeast cells and in the case of Isinglass on protein/polyphenol complexes (chill haze) to pull them into larger denser clumps which settle faster.
PVPP is totally insoluble and can be added to beer at any time, there are specialised versions, the kettle version usually called Brew Bright (or variations of same) contains a mixture of PVPP and k-Carrageenan the same active ingredient found in Irish moss, KoppaFloc, Whirlfloc ... Its the fining not the PVPP.
Post fermentation treatment form range from granules mostly used in wine making (removes polyphenols that cause pinking in white wine) to blends of PVPP and Silica Xerogel, neither of which are a fining but act to bind both polyphenols and <40,000 MW proteins that are the other half of the chill haze equation. Ad blurb but good info on Polyclar 730
View attachment Superior_Colloidal_Stabilization_of_Beer_With_Polyclar_Plus_730.pdf
This is the OT bit because PVPP is trying to hook up with very specific and quite rare polyphenols the less other crud floating around and getting in the way the better; or to put it another way the clearer the beer the better the PVPP can do its job.
So do all the Fining you can first, then use the PVPP to keep the beer stable.
MHB