Preparing the work area
Working on a covered slipway presents problems such as lack of height and space, difficulty moving equipment etc. To improve workspace the whole area under the vessel must be floored with plywood sheets. A preparation [wetting-out etc] room is made under the stern of the boat.
Sand-blasting
In order to remove all dried, potentially reactive material from the original lay-up the hull is sand-blasted with garnet grit. This process also gives an ideal 'keying' surface for any epoxy to be applied.
Water-blasting
The hull is high pressure washed several times after sand-blasting to remove any acidic material. Ph level is tested and water washing continues until Ph is the same as the water being used for washing. The hull is then left to dry for 24-48 hours.
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