Originally Posted by
Dave S
Both comments are correct...according to the Polyfiber manual.....if you want to remove Aerothane....scrub some MEK on the backside or the polybrush/polyspray side...it bubbles up just as Jeff said; however, this happens because the MEK dissolves the un-polymerized undercoats (polybrush and polyspray) which are entirely soluble in MEK...
MEK does not dissolve Aerothane at all...just the undercoats if you hit it from the backside - which can be useful if you want and need to do that.
A solid coat of Aerothane will remain unaffected by MEK if the MEK is applied to the outside.......also a useful deal....I have on occasion used a MEK soaked rag to get some really stubborn crud off the outside of the plane, which is painted in Aerothane. The caveat is the Aerothane coat has to be solid/no cracks or breaks in the aerothane coat. If there is a crack or void in the Aerothane.....it is bubble city.
Polytone is very serviceable in that it can be sequentially un-painted...the top colorcoat of polytone can be ragged off with a MEK soaked rag leaving most of the Polyspray....the polyspray can then be ragged off with a MEK soaked rag leaving most of the Polybrush...the polybrush can then be ragged off with a MEK soaked rag down to the fabric and a person can then repair and rebuild his paint job after everything dries off. The down side is a Polytone finished airplane does not have the stain and solvent resistance that Aerothane does.
Turns out that Polytone and Aerothane are just plain different critters, each with it's own good and bad points...
Sincerely,
Dave S
KF7 Trigear _ Flying
912ULS Warp Drive
St Paul, MN