C152 PLT INADVERTENTLY ENTERS RWY BLAST PAD AT SFB; FL. CITES POOR MARKINGS AND UNFAMILIARITY.

Narrative

I WAS PARKED FOR RUNUP AT THE SW RUNUP AREA AT SFB. UPON COMPLETION OF THE RUNUP; I CONTACTED GND FOR TAXI TO ACTIVE. I WAS FACING THE TWR. THIS PUT OPEN AREAS EQUAL DISTANCE FROM ME. I WAS TOLD TO TAXI TO RWY 27C. AT THIS POINT I PULLED FORWARD. I WAS UNFAMILIAR WITH THE ARPT AND HAD ASKED FOR PROGRESSIVE TAXI INSTRUCTIONS UPON ARR; BUT I THOUGHT I UNDERSTOOD THE DIRECTIONS. I THEN PULLED ONTO THE BLASTPAD AREA OF RWY 27/9C. THERE WAS A PLANE AT THE FAR END OF THE RWY (3000 FT). HOWEVER; I SAW WITHIN 20 FT THE CHEVRON AND BEFORE THE CTLR FINISHED SPEAKING; I WAS OFF THE RWY. WHAT I SAW WAS A SET OF UNCLR SIGNS. THERE IS ALSO A LOT OF CONSTRUCTION AT THAT ARPT; SPECIFICALLY WHERE I WAS. ALSO; THE ACFT ARE PARKED ON A RAMP WITH VIRTUALLY NO MARKINGS TO SEPARATE THE RUNOFF AREA. THERE IS A SIGN IN TALL GRASS. THERE IS ALSO ANOTHER SIGN NEXT TO THE INTXN. THERE IS A LOT OF OPEN GND AND IT WAS DUE TO THESE FACTORS; I BELIEVE I BECAME DISORIENTED. WHILE I DON'T WANT TO BLAME ANY ONE THING; I SHOULD HAVE CLARIFIED MY POS; BUT; I HAVE SINCE HEARD THAT OTHERS HAVE HAD THIS PROB AT THIS INTXN. ALL IN ALL; I PENETRATED THE BLAST PAD AREA OF RWY 27C AT SFB WHILE ANOTHER ACFT WAS ROLLING ON. I WAS IN NO MORE THAN 20 FT AND SPUN IMMEDIATELY; BUT I STILL ENTERED WITHOUT A CLRNC. ALSO; I DID SEE THE OTHER ACFT AND WAS HESITANT TO PROCEED; BUT I RECALLED INSTANTLY THAT MY INITIAL TAXI WAS ON A TXWY THAT HAD 2-WAY TFC. THIS SHOCKED ME AS I HAD NEVER SEEN THIS BEFORE.