After the initial sanding back with the long board...

[Linked Image]

NB:
long board - that's what I call it, basically its a car panel beaters sander, and its ideal for this type of repair, I have an air one aswell but prefer the hand one ....
google long board sander for pics if your unsure of what one looks like

Yar, & this ere post be done without a sin'le drop o' rum passin' me lips

Kingy
started with Impara Cadet #3 / Mosquito #245
& now Mosquitos #1182 & #1740