|The blasting begins!|
We decided to sandblast inside, and then spray it. Then we would sandblast the outside and spray that. Of course the blasting outside would damage some of the paint inside. As a sop to my paranoia about rust it was conceded to blast the loose parts like tanks and window frames on the last day of blasting, so the painting could begin immediately.
|Hard, dirty work. There has to be a better way.|
The first problem was that, once we had blasted the outside, rust spots appeared overnight, requiring a second brush blast. And the loose parts picked up damp from the floor they were laid on, showing rust within hours, again requiring a second blast. Secondly the blasting opened up pinholes and porous welds, at a time where re-welding was just not possible. Thirdly we did not realise how difficult it would be to remove the spent grit from inside. The contractor eventually gave in and rented an industrial vacuun cleaner, which did the job in minutes.
|Rust spots on the rudder within hours. Damp floor is the cause|
Outside blasting did not cause much damage to the inside paint as far as we could see, but I will do a minute inspection once we are in full sunlight.
Next time I build a boat (Wife having hysterics in the background) I will decide on the paint system before beginning to build. All steel will be blasted at a proper sandblasting plant and coated with a welding primer. Then, as the work proceeds, it will be wire-brushed and re-primed.
And I will not have freshly painted parts nearby when someone brushes grit off the hull....
|Pinholes and porosity.|
Now what remains is a few spots of remedial painting and cleaning up the site, then begins the woodwork. A lot of new mistakes to make...
|And the primer goes on.|