Kent
Member
- Messages
- 9,992
- Location
- Bowland, Lanacshire,UK
The dippers won't give a monkeys about internal coverage. The holes are to let expanding gasses out of hollow objects, if you don't they blow up sending molten zinc and shrapnel all over!If its hollow section you will generally need holes of around 1/2" drilled between the sections and some way of them lifting the trailer to rotate it to cover the internals fully.