COMMERCIAL INST RATED PLT OF A C150; ON A VFR FLT; ENCOUNTERED WX AND BECAME IMC. HE SUBSEQUENTLY OBTAINED AN IFR CLRNC WHEN HE WAS NOT IFR CURRENT OR THE ACFT EQUIP TESTED AND INSPECTED WITHIN THE APPROPRIATED TIME LIMITS FOR IFR FLT.

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ON NOV/FRI/96 I FLEW MY RECENTLY ACQUIRED C150 TO MSN FROM MY HOME BASE AT LNR TO HAVE IT EVALUATED FOR REPLACEMENT RADIOS AND XPONDER. GREEN BAY AFSS RPTED NO AIRMETS OR SIGMETS; VFR WITH NO RECOMMENDATION AGAINST VFR. NO PROB ON FIRST LEG OF FLT; EXCEPT ACTUAL WX WAS MARGINAL VFR FOR CEILINGS AND VISIBILITY WITH SNOW SQUALLS IN THE AREA. ON THE RETURN FLT I ENCOUNTERED SNOW SQUALLS AND GREATLY REDUCED CEILING AND VISIBILITY. I ASKED DEP FOR AN INST CLRNC TO LNR; WHICH I WAS IMMEDIATELY GIVEN. THE FLT OF APPROX 40 NM WAS COMPLETED WITHOUT INCIDENT. TOPS WERE ABOUT 4000 FT; ICE ON THE CLB OR DSCNT; AND CEILINGS AT LNR WERE ABOUT 2500 FT. I HAD CURRENT CHARTS AND APCH PLATES. THE PROB WAS THAT NEITHER I NOR THE ACFT WERE CURRENT FOR IFR; WITH NEITHER THE 30 DAY VOR CHK NOR THE 24 MONTH PITOT STATIC AND ALTIMETER CHKS CURRENT. I WAS A FEW MONTHS OUT OF IFR CURRENCY. IN MY RUSH TO DEAL WITH THE IMC ENCOUNTER; MY FIRST REACTION WAS TO ASK FOR IFR; KNOWING THAT THE IMC WAS ONLY PARTLY ALONG MY RTE. I DID NOT CONSIDER CURRENCY REGS UNTIL I WAS CLRED UNDER IFR AND IN IMC.