En fait, il ne faut pas parler de "métiers manuels"...
Liste officielle des métiers interdits :
OCCUPATIONS AND PROFESSIONS PROHIBITED FOR FOREIGN WORKERS
THE LIST APPENDED TO THE ROYAL DECREE IN B.E.2522
PRESCRIBING OCCUPATIONS AND PROFESSIONS PROHIBITED FOR FOREIGN WORKERS
1. Labour work;
2. Agriculture, animal husbandry, forestry, or fishery, except work requiring expertise, specialized work, or farm supervision work;
3. Bricklaying, carpentry or other construction work;
4. Wood carving;
5. Driving motor vehicles, driving a non-mechanically propelled carrier or driving a mechanically propelled carrier, except for piloting international aircraft;
6. Shop/Outlet attendance;
7. Auction;
8. Supervising, auditing or providing services in accounting, except internal auditing on occasions;
9. Cutting or polishing diamond or precious stones;
10. Haircutting, hairdressing or beauty treatment;
11. Cloth weaving by hand;
12. Mat weaving or utensil making from reeds, rattan, hemp, straw or bamboo pellicle;
13. Mulberry paper making by hand;
14. Lacquerware making;
15. Making Thai musical instruments;
16. Nielloware making;
17. Gold ornaments, silverware or pink gold making;
18. Bronze ware making;
19. Thai doll making;
20. Mattress and quilt blanket making;
21. Alms bowl making;
22. Hand making of silk products;
23. Buddha image making;
24. Knife making;
25. Paper or cloth umbrella making;
26. Shoemaking;
27. Hat making;
28. Brokerage or agency work, except broker or agency work in international trade;
29. Civil engineering works concerning design and calculation, organization, research, project planning, testing, construction supervision or advising, excluding work requiring special expertise;
30. Architectural work concerning designing, drawing of plans, cost estimating, construction directing or advising;
31. Dressmaking;
32. Pottery or ceramic ware making;
33. Cigarette rolling by hand;
34. Tour guide or sightseeing tour operation;
35. Street vending;
36. Typesetting of Thai characters;
37. Silk reeling and twisting by hand;
38. Clerical and secretarial work;
39. Legal service or lawsuit work;
**Note: As per the Cabinet’s Resolutions, foreign workers from Myanmar, Laos and Cambodia have been given an indulgence to work in the Kingdom in 2 occupations, which are 1) Labour work and 2) Domestic work.
http://www.mol.go.th/en/content/page/6347