Painting over butt joins can be a challenge. Previously I've shown some samples where I've tried different methods of achieving a seamless butt join with a paint finish over, using automotive paint. They are now complete:
This one illustrates the problem. Ply also has issues:
A cheat solution (shown in ply) is grooves:
A better solution uses fibreglass reinforced filler, with two part filler over
You can see the end grain has started to show through.
The best result was achieved with MDF:
It turns out that MDF is actually easier to work with than ply, where the entire surface must also get some attention.
This one illustrates the problem. Ply also has issues:
A cheat solution (shown in ply) is grooves:
A better solution uses fibreglass reinforced filler, with two part filler over
You can see the end grain has started to show through.
The best result was achieved with MDF:
It turns out that MDF is actually easier to work with than ply, where the entire surface must also get some attention.
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