I have an old Karcher pressure washer that leaked and blew a power semiconductor. Rather than guess I simply bought a new board in the hope I could read the identification markings. Unfortunately the board is covered in a clear glaze which is obscuring the markings. Any idea how one can remove the glaze but leave the markings? I've attached a picture of the semi - its used to drive a relay - its beside the 10K SMD resistor and the tiny 220pf capacitor

 

That glaze is known as a conformal coating to prevent corrosion from moisture. One way that is used to remove it is with solvent but I suspect solvent might remove the part number. Another is to use a heat gun to soften it to the point you can carefully scrape it off.

 

Looks like a to 223 cased mosfet with markings P1M G F038. It's used to control a relay on a karcher steam washer. Searching the web I can find people claiming they have stocks but no data or equivalents