I am planning on doing some serious priming of sandblasted T parts and I read of a black epoxy primer used as described in this thread:
Unfortunately I can't find it available on the web anymore. Any substitutes?
I've used black epoxy primer from SPI with good results:
Do a search on "SPI epoxy" to get an idea of the reviews.
DP90LF is available anywhere. Excellent stuff, I recommend it.