Paul..........if you put on the normal filler try to apply it as smooth as possible with a long filler knife,it saves you lots of sanding.......
Also try to sand with a longboard,it keeps the sanding flat.
Etch primer is only useful as the sanding is done,otherwise you are sanding the expansive etch primer away.
Just use a cheap rattlecan matt black to dust the sanded area so you can see after fine blocksanding where the low spots are.
Good luck,René.
|