A mate painted the underside of his land cruiser in red diesel and used engine oil
It was rusty and ginger in under 2 years
When Iv restores cars Iv used dinatrol and taken the same car apart 6 years later to see no rust.
My best mate has recently restored a Morris van that was wax oiled every year from new but it’s owner. Other than the litter rear arch’s needing welding it was soid as a rock
I have my Land Cruiser treated with Krown oil and is doing a good job, never been very keen on covering it in a paint on product as the water gets behind it and it falls off
Where did you buy it. I did see the review and looked into it but it didn't seem to be very readily available and or was quite expensiveAnother option is Noxudol, I went down that route on my Landy, Alfa and Saab: https://www.auson.se/sites/default/files/rusttest_noxudol_700_classic_monthly_uk.pdf