i can tell you right now FPII and a white pad are not enough on toyota paint, even though its on the softer side, especially with a PC...
Orange pad with a medium compound...go over the whole truck...removing all the swirlmarks and light scratches...I like
menzerna, but find 83 to work rather well.
then step down to a white pad with FPII, then FPII with a lighter pad if you want, or just wax it and be done...
sealants are designed to last about 3-5 months...not 6 weeks...
and dont worry about every little scratch and swirl mark...they are inevitable unless you want to spend 2-3 hours washing a car....I dont...I have better things to do with my life than WASHING a car...
You bought a black truck, you should know they look the best, but they require more frequent polishing...
I would polish every other month with a light polish like FPII/white, but not for full swirl removal, but rather to keep the luster and shine from the truck...and use a glaze then a carnuba wax on it...GET THE MOST FROM YOUR BLACK PAINT - wet, deep, liquid looking like it just got out of the paint booth!!!