AN ATX LR35 FLC WAS ATTEMPTING TO TURN OFF OF THE END OF RWY 34L WHEN THEY LOST TRACTION AND SLID FROM THE PREPARED SURFACE. THE RPTR SAID THAT HE HAS COMPLAINED ABOUT THE TYPE OF PAINT USED ON THE RWYS SEVERAL TIMES PRIOR TO THIS EVENT. THE RWY MARKINGS HAVE NOW BEEN REPAINTED WITH SLIP RESISTANT PAINT. NO DAMAGE.

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WE LANDED AT VNY AND SLID OFF THE END OF THE RWY WHILE ATTEMPTING TO EXIT ONTO A TXWY. THE RWY WAS WET AND IT WAS RAINING BUT WE BELIEVE THE CAUSE OF OUR OCCURRENCE WAS DUE TO THE LACK OF SILICA IN THE RWY PAINT. BEING BASED AT VNY WE HAVE HAD NUMEROUS ENCOUNTERS WITH THE RWY IDENT PAINT AND ITS TENDENCY TO BECOME VERY SLICK WHEN WET; BUT TODAY THE SURFACE WAS MORE THAN SLICK. WE HAD SLOWED TO APPROX 3-5 KTS ANTICIPATING THE SLICKNESS OF THE SURFACE; BUT WHEN WE ENCOUNTERED THE PAINTED AREA OUR BRAKING BECAME NIL AND OUR STEERING WAS INEFFECTIVE. WE DID EVERYTHING WE COULD TO STOP; BUT ENDED UP GETTING STUCK IN THE MUD JUST TO THE R OF THE END OF THE RWY. THE RWY WAS CLOSED FOR APPROX 45-60 MINS. WE FEEL THAT IF THE SURFACE WAS REPAINTED WITH THE PROPER SILICA IN PLACE THAT THIS WOULD NOT HAVE OCCURRED. WE HAVE MADE A REQUEST WITH THE ARPT MGR TO REPAINT THE SURFACE. THERE WAS NO DAMAGE TO THE ACFT OR THE RWY. THERE HAS BEEN SIMILAR EXCURSIONS IN THE PAST MONTH AND WE HOPE THE ARPT WILL REPAINT THE SURFACE BEFORE SOMEONE GETS HURT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR SAID THAT HE HAD SPOKEN TO THE ARPT MGR SEVERAL TIMES ABOUT THE TYPE OF PAINT THAT HAD BEEN USED ON THE RWYS AND TXWYS. HE SAID THAT HE AND OTHERS HAD EXPERIENCED A LOSS OF BRAKING AND STEERING ON THESE PAINTED SURFACES WHEN THEY WERE WET. IN THIS INCIDENT; THE CREW HAD SLOWED TO LESS THAN NORMAL WALKING SPD BEFORE STARTING THEIR TURN ACCORDING TO THE CAPT. THE ACFT STARTED TO TURN THEN IT SIMPLY SLID TOWARD THE CORNER OF THE RWY AND OFF AT SLOW SPD. THE SURFACE WAS TOO SLIPPERY FOR THE ACFT TO TURN OR BRAKE. THE FLC EXITED THE EMPTY ACFT AFTER CALLING THE TWR AND WAITED FOR A TUG. THERE WAS NO DAMAGE TO THE ACFT OR TO ARPT PROPERTY. WHILE ARPT PERSONNEL AND MAINT WERE INSPECTING THE ACFT AND PREPARING TO TOW; THE ARPT MGR ARRIVED AND INSPECTED THE SLIPPERY PAINT SURFACE HIMSELF. THE MARKINGS HAVE NOW BEEN REPAINTED WITH NON SLIP PAINT.