Oily wood...
I was once gifted an RC airplane, called an astro hog. This astro hog had years and years of flight time on it. It was very well constructed, but after years of flying, the wood at the firewall, foredeck and bottom was soaked through with caster and synthetic oils from the model airplane fuel. I needed to dry that wood out and epoxy had to stick to it, in order to replace the firewall. I used K2R (not KR2) spot lifter. Every day for 2 weeks I'd apply the spot lifter, every night, scrap it off and reapply. Afer two weeks, I was able to install a new firewall to that (once) oil soaked fuselage, allowing me to install the new (twice max recommended power) german engine I had in surplus. worked great, lotsa poser too. Unfortunately the plane was lost when the ailerons responded to uncommanded input (on short final) from a defective potentiometer in the RC handset. The firewall never let go of what was at one time oil soaked wood. jg
