AoA, Paint remover is the best way to strip off the paint & get bare sheet metal below but be very very careful using it.
You can use a paint brush to apply the remover chemical but be sure to wear gloves, face mask and safety goggles. One little drop on your skin will burn like hell (I used to keep a bottle of water with me just in case)
Apply the remover one a piece,
Wait for the paint to start bubbling,
Use a metal scraper to remove the paint muck,
Repeat where needed.
Keep your gloves on and wash very with surf water, I used Lemon Max dishwashing liquid soap.
Hope it helps.