smoothing rust pits, and engine bay color Options

[scotty914]

ok i am slighty motivated to go work on my car again. i did the engine bay in paintable undercoating, now after seeing all of the pretty engine bays i want to clean mine up. so i am going to pull the motor or more like untie it and strip the under coating. the reason i did the under coating is two fold one was for sound purposes, the second was my pass side frame has rust pits but no rust holes. my car is black ( only real porsches are black). but i want a brighter color in the engine bay.

so do i use epoxy filler to fill and smooth the frame, i know grinding would take too much metal out, or would por 15 fill em in. i am thinking about using por 15 silver in the engine bay but how would that look with the body black or are there better colors. btw i do not have spray equipment so thats one reason for por

heres a pic with it in rust converter spray primer