Can you repair a warped wastegate penny?

[stu21t]

I have just found out my wastegate penny isn't sealing, it only makes contact about 20%.
Can you take the penny out?
Then use valve grinding paste on it to flatten it out so it seals properly?
That would b great if I can, just need to figure out how to strip it, any1 done it before?
If not I've got a spare 0.48 to fit while I get my 0.63 repaired.
Then can any turbo place fix it? Any1 know a rough price?

[Adam L]

You can only get it out by grinding off the wastegate arm, but you need to mark it in the position it came off in if you're going to re-use it and the assembley just slides out of the sleeve. I've never seen a warped penny, you could have another problem.

You'll have to weld the arm back on afterwards, obvisouly.