Like the title says, I don't know if i can make it more clear. I tried changing the surface type of model phong materials and converted them a million times but they don't seem to change in game. Any ideas?
You're probably compiling the wrong FF. If it's a model in your map you need to recompile your map. If it's a model you have NOT used in your map and instead have included in a separate CSV for precaching purposes, you have to recompile that specific FF. If the model is in your map AND included from another CSV you have to recompile your map and the other CSV's FF.
TL;DR; recompile all FFs loaded by the map to ensure the model will get refreshed. Recompiling the models will reload all related materials.