Hi how do you get the fuel out of balsa which methods do you fellow modellers use ? I had a pin hole in my fuel tank and it has pumped fuel into my fuse and the landing gear supports have let go on the supports. Fuel was 15% nitro seemed to eat through the dope , maybe it was not thick enough. Thanking you Dean (outback OZ)
Clean well with alcohol, I use the 91% found in drugstores, then apply K2r and let set for several hours. Repeat the k2r as required until it' clean. To keep wood from soaking up oil, get some yellow carpenters glue and thin slightly with watet and brush it on the wood. I've used this method for 20+ years and have never had it fail. I Always use it to coat my firewall and surrounding areas. It's as good as, lighter than and cheaper than epoxy
Dope is not fuel proof like other sealers. It is merely fuel resistant. That "hot fuel proof" that you used to see on the bottles (Pactra?) was referring to the exhause which had little alcohol or nitro left in the oily mess.
K2R Equivalents here are similar to Goddard's Dryvleaner - most of the cleaner type sprays that dry quickly to a white or light coloured powder which sucks the stains out of porous materials.
Use brown paper and an iron = place brown paper over fuel soaked places and run iron over outside - use several times to suck the oil up like paper sucks up the fat in a packet of Fish & Chips......
"Kitty litter" applied liberally and left for a few days. i.e. any material that has greater "blotting paper - sucking power" than the balsa
For more methods - Refer to the FAQ section on
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Dean, if you can't find K2R in Oz, you can make your own out of any solvent that will dissolve the oil and cornstarch. In the past, I've used denatured alcohol (ethanol made undrinkable), but probably acetone, MEK, or other organic solvent would work. Make a slurry of starch and solvent and paint it on the oily surface. Be careful, however, and do this in a well-ventilated area and wear gloves resistant to the solvent, as a lot of the stuff isn't good for your health. As the solvent dries, it carries the oil with it through the cornstarch, where it's trapped. Then, brush/vacuum/wipe the residue off. Repeat as necessary. when you've soaked up as much oil as you can, paint the surface with a sealer such as Balsarite. BTW, next time try painting your fuel tank area with thinned epoxy. It's definitely fuel proof!
Use a heat gun in a WELL ventilated place. The oil is what is soake
into the wood the rest has already evaporated. The heat will draw ou the oil and soak it up with paper towel as you go(plus the heat dry the wood). THEN Epoxy thinned with alcohol will fuel proof it. Th suggestion of drilling a small hale is a good one as well. The woo will still appear to be stained but it will be dry and oil free so yo can cover it again