My opinion (or cover my butt

)
Only one Repairman's cert given to an experimental, not transferable.
If you buy a stripped project, good luck getting a Repairman's.
If your project is 'bare', and you find a substantial # of items in need of correction/repair before final paint/DAR inspection, document everything... everything. Every dis-assembly, every repair, every ... Then submit for a Repairman's. Worst they can say is no.
Since these are experimental, you can do anything on your aircraft, anything. Issue is signing off the annual condition inspection. And/or major airframe modification, which will require an additional 'test' phase.
IMHO, FYI, don't forget to floss...
Rick