Cleaning Tanks

[Bigfoot]

We are in the process of restoring a Ford Consul and looking at cleaning tanks to help clean a lot of the items needed as nearly 50 years worth of dirt and oil isn't great I can get Sealey cleaning tanks from work but not sure what im looking at, as all of them are saying about a min level and a maximum level of degreasing solvent. Ones looked at was 40 litres min but then looked at prices of solvent and its like £80 for 20 litres, it cant be that expensive can it looking at pdf sheets on this product for the solvent its not clear on how to use it, do you mix it with water, is it a one use product, or can you just keep it in tank or put it back in the bottle to use again. As paying over £100 for the tank then another £160 on the solvent seems a bit extreme. Any info or anyone who has got a cleaning tank?

Cheers