Psyren, thanks for your response but I do prefer to do an A/B as I already have Calcium Hydroxide.
By the way, I ended up buying Ronansol Lighter Fluid. As soon as I get it, I'll test if it leaves any type of residue. I shouldn't have created this topic because finding Naptha and Calcium Hydroxide was a matter of searching more.
But, since I created, where the heck can I find destilled white vinegar? I live in Portugal and I've gone to every supermarket and grocery shop. It simply doesn't exist! I've also searched on eBay, Amazon and so on and it's the same, can't find it! It's quite expensive the ones I get, like, more than 25€.
What do you guys think about
this one? Does anyone have a suggestion? It's the only thing that I can't get..