ORIGINAL: stuntflyr
Splashing 10 percent nitro on your lacquer or dope finish will put white spots on it, no doubt. The fuel residue out of the exhaust is not a problem as long as one wipes the model down well and cleans it with some detergent and waxes it periodically. I've got some really old dope, and lacquer models with little to no staining, by being careful.
Chris...
I have had had a few dope and acrylic laquer models and have never had lasting stains from raw fuel. Pretty sure I have spilt at least up to 15% on them. If you wipe the fuel off right away there is no problem. But if you let it sit for a while they may soften up the paint ,if you don't touch it it will harden back up, no spots but any gloss will be slightly duller. Wait a day or two and a bit of pollishing compound will take care of that.