Ensure you get that specific product. If you have to get a buffer, try sanding up to a higher grit. If you started at say 600, work your way up using the cross hatching technique to 2000-25000 and then try hand rubbing it hard.
I did lights already with 1500 and 2000 before using the no.7 compound that comes as a white paste. It was much harder that way lol.