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The barrel is already bead blasted. Seems to be almost the same as applying Gunkote. Gunkote finishes haven't held up very well for me. Hopefully this will hold up better.
Have you tried it on a receiver?
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I have not, might be a little thick for a receiver and I did spray it with the LMT gas block in place.
If you bake it per directions after spraying a light full coverage coat on a clean warm barrel you will not be disappointed with the results.
With the barrel bead blasted, I see zero reason to prime, just clean, heat up in the oven and clean again, then shoot (no pun intended) it warm.
Coat hangers make excellent stands (when bent into shape) so it is free standing on a cookie sheet, but remove the cotton from the barrel and tape from the chamber/extension/threads.
I actually baked the above MRP SS 16 barrel about an hour longer than recommended.
Turned the barrel extension where it is locked down by the MRP chassis a beautiful light gold.
And this barrel is second only to my SS 1/7 lightweight profile Krieger 16" Recon/OPS cut tube in accuracy and maintains consistency with a variety of bullet weights/loads.