Most mahogany is pretty porus. Perhaps as you have so many layers of paint to remove. There are many variations of electric paint strippers that pose no fire hazzard if used intelligently.. I have a couple with what looks like a small stove element in an enclosure with a scrapper on one end. You heat the old finsh up till it bubbles and drag the scapper blade over it. Gets the majority without changing the color of the wood. Personally I do not like using the old method of a naked flame to strip with because of the fire hazzard.

Most really good chemical paint strippers have been taken off the market because of health and enviroment issues quite a few years ago. Actually the active ingredients were removed and substituted with much weaker and slower acting chemicals..

Since imiron is the preffered aircraft finish over metal usually.. Aircraft paint strippers would be pretty powerful. A fan to direct the fumes out of say an enclosed porch should work. After stripping you clean the remaining residue on the wood down with laquer thinner and steel wool pads usually.