Mixing paint brands

I've ordered the cheap grille off partsgeek to paint and cut up and hopefully I'll get to at least sand and prime it on Sunday. Over the last couple days I've made quick stops after work to grab some stuff I'll need here's what I got.

Dupli-color Adhesion Promoter
Krylon Primer
Color matched paint mixed by NAPA (i believe its an SEM product)
Krylon Clear Coat

My question is can any of you see any problems with using somewhat mismatched products like this?

 

i wouldnt do it but I haven't painted anything in years.

 

all brands will recomend their own line of products, but i dont see a problem with it, im no expert though.

 

Alright well I guess I'm gonna give it a shot either way. I'll still have the stock grille in case it turns out crappy. Maybe I'll just spend extra time prepping it and all that.