Painting Fiberglass

1
Painting Fiberglass
2

• GRP (glass reinforced plastic) is a polyester
  resin strengthened by glass fibres. When combined
  in the correct proportions under controlled
  conditions, these high strenght low weight
  materials require little maintenance and can be
  produced for relatively low cost.

3

• A model hull or plug is produced from which a
  female mould is laminated. A wax mould release
  agent is first applied to the inside of the mould
  and then a polyester gelcoat is applied in liquid
  form.

4

• The gelcoat is then strengthened from behind by
  the application of chopped strand or woven roving
  reinforcement saturated in polyester resin. This
  combination of gelcoat and laminate provides a
  high resistance to water, chemicals and impact.

5
(No Transcript)
6

• Timing of the various applications, the control
  of base resin and catalyst additions and the
  avoidance of air bubbles are all critical in
  determining the quality of the final moulding.

7

• After a curing period the hull is removed from
  the mould. This is made possible by the mould
  release agent which was initially applied. An
  amount of release agent will remain on the hull
  and it is essential that this is removed prior to
  painting. 

8

• Painting of GRP may be necessary for a number of
  reasons. It has no antifouling properties and
  will require protection. It can be affected by
  ultraviolet degradation and general wear and tear
  over a period of time which may cause the
  cosmetic appearance to deteriorate.

9
Painting Glassfibre

• Glassfibre, or GRP (glass reinforced plastic), is
  a polyester resin strengthened by glass fibres,
  creating a high strength, low weight material
  which requires little maintenance. The outer
  shell of the glassfibre has a layer of gelcoat.

10

• Over time gelcoat and glassfibre can be affected
  by UV (ultraviolet) degradation and general wear
  and tear which will cause the cosmetic appearance
  to deteriorate and eventually it will need
  painting to protect the surface. GRP is
  susceptible to a condition called osmosis
  see Osmosis section.

11
Particular tips when painting glassfibre

• New gelcoat contains large residues of wax and
  mould-release agents which must be removed before
  painting. These residues can be extremely
  persistent and old gelcoat will probably still
  have traces, so it is important to carry out a
  degreasing procedure to remove them.

12

• Old and weathered gelcoat and GRP can become
  porous and may need extra attention.
• For advice on repainting glassfibre see the
  section on Repainting.

13

• For more Update, visit us

http//pompeismarine.com/
14
(No Transcript)