used a can of textured spray paint (light coat ) this stuff adds weight quick or like tom said use clear no smoke here you would have to ask panzlflyer about how his balanced as he has basically the same setup as me also got all ignition wiring routed and hooked up using a smart fly ignition cutoff i figured it would be lighter then a choke servo to cut the motor no problems reaching through the muffler holes i cut for the choke on my 41% it came out tailheavy because i had 2 5955's on each elevator but looking at the pics from panzlflyer it looks as tho his plane came out very neutral as his batteries are mounted close to the wing tubes