por 15 or rust bulet

I tried this in the restoration with no responce.
Which do you prefer por 15 or rust bullet? Any tips or tricks when using these products? and who has used http://www.safestrustremover.com/default.asp
any advice?

Go here:

https://board.moparts.org/ubbthreads/search.php?Cat=0

Copy and paste this into the keyword search terms box:

+rust +bullet +por

Set the date range to "newer than 8 years" and hit submit. Then enjoy.

Thanks I went thru all the posts. So doest anyone recomend using their metal blast?