never heard of Varsol, so no. my go to deep scrubber is mineral spirits and an old toothbrush, dry, then soak in wd-40 for a while for half an hour or so, wipe dry, coat in RIG and rub off excess. I'm still waiting on my loading gate to come in with my furniture, then I will test assemble everything and test for fit and function before soaking in rust remover and lightly sanding the outside with 400 grit. I have some experimenting to do before making a final decision on bluing. Much to do still.