im sorry you told polyster resin to lay on part and polish not to lay polyster-gelcoat! so i not understand you.

You just need to ask for a polyester gel coat and get a good quality one...

http://www.ecfibreglasssupplies.co.uk/p-1483-clear-polyester-gel-coat-inclusive-of-catalyst.aspx

This is a crystic 65PA gel coat... So if you have a Scott Bader supplier they will have it..

in lithuania 

Are you in the UK or Poland? I know several suppliers in both countries

do not understand. i can lay polyster on part then brush till 3000 paper and simply polish correct? no need laquer as you told uv protected?

You have to sand to get rid of any high spots.

dam so cactus why others waiste time and work and sand parts if result be the same.??

yes

so cactus you say i wrap part i lay polyster clear and polish and perfect hard finish and uv protected and not appear any white spots from sun and etc?

Any polyester will protect against UV. When cured, the ester groups create benzene rings which absorb UV light.