Hello: I am restoring a 1976 MGB. Rust-free dent free example (surface rust on floor). Engine out. Body work is starting in May. Plan to use SPI epoxy primer as much as possible for blocking and use G2 where needed but not everywhere, Seal in SPI epoxy primer and then finally single stage urethane. Before that can happen, I am at a decision point regarding paint removal. The original weird yellow looks to be very much intact, but the red respray is chipping and cracking. Options are to media blast the car to bare metal, or to try to mechanically or chemically remove the red layer. I see advantages to leaving the original base coat in place if possible. Any thoughts as to methods to try to remove the inferior red layer without taking out the quality original base layer? Thank you.