I just tried another batch with a slightly heavier concentration of TSP. After about 30 minutes of soaking the hotstamps started to fade to a grey color and easily scrubbed away, and the TSP didn't seem to make much of a difference for actually cleaning the base. I didn't try scrubbing the hotstamps with the more diluted batch of TSP. So +1 to those saying avoid unless you want to relabel your chips or get rid of the hotstamps.
I might try Simple Green next if I can find it.
I might try Simple Green next if I can find it.
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